Home / 28,240.91-38,972.47-15,665.66

Finding the Fourth Proportional to 28,240.91, 38,972.47 and 15,665.66

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Solution

The fourth proportional to 28,240.91, 38,972.47 and 15,665.66 is: 21,618.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.91 : 38,972.47 = 15,665.66 : x
  2. Step 2: Convert to fraction form
    28,240.91/38,972.47 = 15,665.66/x
  3. Step 3: Cross multiply
    28,240.91x = 38,972.47 × 15,665.66
  4. Step 4: Simplify right side
    28,240.91x = 610,529,464.38
  5. Step 5: Solve for x
    x = 610,529,464.38/28,240.91
  6. Step 6: Final answer
    x = 21,618.62

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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.