Home / 28,312.10-42,487.28-10,781.47

Finding the Fourth Proportional to 28,312.10, 42,487.28 and 10,781.47

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Solution

The fourth proportional to 28,312.10, 42,487.28 and 10,781.47 is: 16,179.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.10 : 42,487.28 = 10,781.47 : x
  2. Step 2: Convert to fraction form
    28,312.10/42,487.28 = 10,781.47/x
  3. Step 3: Cross multiply
    28,312.10x = 42,487.28 × 10,781.47
  4. Step 4: Simplify right side
    28,312.10x = 458,075,434.98
  5. Step 5: Solve for x
    x = 458,075,434.98/28,312.10
  6. Step 6: Final answer
    x = 16,179.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.