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Finding the Fourth Proportional to 12,389.69, 17,098.62 and 7,012.13

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Solution

The fourth proportional to 12,389.69, 17,098.62 and 7,012.13 is: 9,677.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.69 : 17,098.62 = 7,012.13 : x
  2. Step 2: Convert to fraction form
    12,389.69/17,098.62 = 7,012.13/x
  3. Step 3: Cross multiply
    12,389.69x = 17,098.62 × 7,012.13
  4. Step 4: Simplify right side
    12,389.69x = 119,897,746.26
  5. Step 5: Solve for x
    x = 119,897,746.26/12,389.69
  6. Step 6: Final answer
    x = 9,677.22

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Half scale
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Double scale
Find fourth proportional to 12,390.69, 17,100 and 7,013.13
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.