Home / 30,929.28-42,681.72-16,781.80

Finding the Fourth Proportional to 30,929.28, 42,681.72 and 16,781.80

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Solution

The fourth proportional to 30,929.28, 42,681.72 and 16,781.80 is: 23,158.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,929.28 : 42,681.72 = 16,781.80 : x
  2. Step 2: Convert to fraction form
    30,929.28/42,681.72 = 16,781.80/x
  3. Step 3: Cross multiply
    30,929.28x = 42,681.72 × 16,781.80
  4. Step 4: Simplify right side
    30,929.28x = 716,276,088.70
  5. Step 5: Solve for x
    x = 716,276,088.70/30,929.28
  6. Step 6: Final answer
    x = 23,158.51

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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.