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Finding the Fourth Proportional to 12,681.95, 17,507.19 and 8,440.07

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Solution

The fourth proportional to 12,681.95, 17,507.19 and 8,440.07 is: 11,651.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.95 : 17,507.19 = 8,440.07 : x
  2. Step 2: Convert to fraction form
    12,681.95/17,507.19 = 8,440.07/x
  3. Step 3: Cross multiply
    12,681.95x = 17,507.19 × 8,440.07
  4. Step 4: Simplify right side
    12,681.95x = 147,761,865.34
  5. Step 5: Solve for x
    x = 147,761,865.34/12,681.95
  6. Step 6: Final answer
    x = 11,651.35

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Half scale
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Double scale
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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.