Home / 42,486.60-63,732.30-12,905.40

Finding the Fourth Proportional to 42,486.60, 63,732.30 and 12,905.40

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Solution

The fourth proportional to 42,486.60, 63,732.30 and 12,905.40 is: 19,358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,486.60 : 63,732.30 = 12,905.40 : x
  2. Step 2: Convert to fraction form
    42,486.60/63,732.30 = 12,905.40/x
  3. Step 3: Cross multiply
    42,486.60x = 63,732.30 × 12,905.40
  4. Step 4: Simplify right side
    42,486.60x = 822,490,824.42
  5. Step 5: Solve for x
    x = 822,490,824.42/42,486.60
  6. Step 6: Final answer
    x = 19,358.83

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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.