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Finding the Fourth Proportional to 28,098, 38,775.60 and 15,523.92

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Solution

The fourth proportional to 28,098, 38,775.60 and 15,523.92 is: 21,423.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,098 : 38,775.60 = 15,523.92 : x
  2. Step 2: Convert to fraction form
    28,098/38,775.60 = 15,523.92/x
  3. Step 3: Cross multiply
    28,098x = 38,775.60 × 15,523.92
  4. Step 4: Simplify right side
    28,098x = 601,949,312.35
  5. Step 5: Solve for x
    x = 601,949,312.35/28,098
  6. Step 6: Final answer
    x = 21,423.21

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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.