Home / 42,487.76-63,729.72-12,905.36

Finding the Fourth Proportional to 42,487.76, 63,729.72 and 12,905.36

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Solution

The fourth proportional to 42,487.76, 63,729.72 and 12,905.36 is: 19,357.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,487.76 : 63,729.72 = 12,905.36 : x
  2. Step 2: Convert to fraction form
    42,487.76/63,729.72 = 12,905.36/x
  3. Step 3: Cross multiply
    42,487.76x = 63,729.72 × 12,905.36
  4. Step 4: Simplify right side
    42,487.76x = 822,454,979.30
  5. Step 5: Solve for x
    x = 822,454,979.30/42,487.76
  6. Step 6: Final answer
    x = 19,357.46

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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.