Home / 12,412.23-17,129.21-7,108.76

Finding the Fourth Proportional to 12,412.23, 17,129.21 and 7,108.76

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Solution

The fourth proportional to 12,412.23, 17,129.21 and 7,108.76 is: 9,810.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.23 : 17,129.21 = 7,108.76 : x
  2. Step 2: Convert to fraction form
    12,412.23/17,129.21 = 7,108.76/x
  3. Step 3: Cross multiply
    12,412.23x = 17,129.21 × 7,108.76
  4. Step 4: Simplify right side
    12,412.23x = 121,767,321.69
  5. Step 5: Solve for x
    x = 121,767,321.69/12,412.23
  6. Step 6: Final answer
    x = 9,810.27

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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.