Home / 28,285.28-39,032.60-15,710.84

Finding the Fourth Proportional to 28,285.28, 39,032.60 and 15,710.84

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Solution

The fourth proportional to 28,285.28, 39,032.60 and 15,710.84 is: 21,680.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,285.28 : 39,032.60 = 15,710.84 : x
  2. Step 2: Convert to fraction form
    28,285.28/39,032.60 = 15,710.84/x
  3. Step 3: Cross multiply
    28,285.28x = 39,032.60 × 15,710.84
  4. Step 4: Simplify right side
    28,285.28x = 613,234,933.38
  5. Step 5: Solve for x
    x = 613,234,933.38/28,285.28
  6. Step 6: Final answer
    x = 21,680.36

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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.