Home / 28,500.84-39,331.28-15,580.38

Finding the Fourth Proportional to 28,500.84, 39,331.28 and 15,580.38

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Solution

The fourth proportional to 28,500.84, 39,331.28 and 15,580.38 is: 21,500.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,500.84 : 39,331.28 = 15,580.38 : x
  2. Step 2: Convert to fraction form
    28,500.84/39,331.28 = 15,580.38/x
  3. Step 3: Cross multiply
    28,500.84x = 39,331.28 × 15,580.38
  4. Step 4: Simplify right side
    28,500.84x = 612,796,288.29
  5. Step 5: Solve for x
    x = 612,796,288.29/28,500.84
  6. Step 6: Final answer
    x = 21,500.99

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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.