Home / 21,142.69-29,176.91-12,759.19

Finding the Fourth Proportional to 21,142.69, 29,176.91 and 12,759.19

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Solution

The fourth proportional to 21,142.69, 29,176.91 and 12,759.19 is: 17,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.69 : 29,176.91 = 12,759.19 : x
  2. Step 2: Convert to fraction form
    21,142.69/29,176.91 = 12,759.19/x
  3. Step 3: Cross multiply
    21,142.69x = 29,176.91 × 12,759.19
  4. Step 4: Simplify right side
    21,142.69x = 372,273,649.41
  5. Step 5: Solve for x
    x = 372,273,649.41/21,142.69
  6. Step 6: Final answer
    x = 17,607.68

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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.