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Finding the Fourth Proportional to 38,946.70, 58,420.05 and 12,654.10

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Solution

The fourth proportional to 38,946.70, 58,420.05 and 12,654.10 is: 18,981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,946.70 : 58,420.05 = 12,654.10 : x
  2. Step 2: Convert to fraction form
    38,946.70/58,420.05 = 12,654.10/x
  3. Step 3: Cross multiply
    38,946.70x = 58,420.05 × 12,654.10
  4. Step 4: Simplify right side
    38,946.70x = 739,253,154.71
  5. Step 5: Solve for x
    x = 739,253,154.71/38,946.70
  6. Step 6: Final answer
    x = 18,981.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.