Home / 42,520.60-63,783.18-12,939.40

Finding the Fourth Proportional to 42,520.60, 63,783.18 and 12,939.40

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Solution

The fourth proportional to 42,520.60, 63,783.18 and 12,939.40 is: 19,409.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,520.60 : 63,783.18 = 12,939.40 : x
  2. Step 2: Convert to fraction form
    42,520.60/63,783.18 = 12,939.40/x
  3. Step 3: Cross multiply
    42,520.60x = 63,783.18 × 12,939.40
  4. Step 4: Simplify right side
    42,520.60x = 825,316,079.29
  5. Step 5: Solve for x
    x = 825,316,079.29/42,520.60
  6. Step 6: Final answer
    x = 19,409.79

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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.