Home / 42,440.72-63,668.92-13,979.28

Finding the Fourth Proportional to 42,440.72, 63,668.92 and 13,979.28

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Solution

The fourth proportional to 42,440.72, 63,668.92 and 13,979.28 is: 20,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,440.72 : 63,668.92 = 13,979.28 : x
  2. Step 2: Convert to fraction form
    42,440.72/63,668.92 = 13,979.28/x
  3. Step 3: Cross multiply
    42,440.72x = 63,668.92 × 13,979.28
  4. Step 4: Simplify right side
    42,440.72x = 890,045,659.98
  5. Step 5: Solve for x
    x = 890,045,659.98/42,440.72
  6. Step 6: Final answer
    x = 20,971.50

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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.