Home / 28,312.12-39,072.90-15,737.68

Finding the Fourth Proportional to 28,312.12, 39,072.90 and 15,737.68

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Solution

The fourth proportional to 28,312.12, 39,072.90 and 15,737.68 is: 21,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.12 : 39,072.90 = 15,737.68 : x
  2. Step 2: Convert to fraction form
    28,312.12/39,072.90 = 15,737.68/x
  3. Step 3: Cross multiply
    28,312.12x = 39,072.90 × 15,737.68
  4. Step 4: Simplify right side
    28,312.12x = 614,916,796.87
  5. Step 5: Solve for x
    x = 614,916,796.87/28,312.12
  6. Step 6: Final answer
    x = 21,719.21

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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.