Home / 39,219.90-54,123.40-21,314.86

Finding the Fourth Proportional to 39,219.90, 54,123.40 and 21,314.86

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Solution

The fourth proportional to 39,219.90, 54,123.40 and 21,314.86 is: 29,414.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,219.90 : 54,123.40 = 21,314.86 : x
  2. Step 2: Convert to fraction form
    39,219.90/54,123.40 = 21,314.86/x
  3. Step 3: Cross multiply
    39,219.90x = 54,123.40 × 21,314.86
  4. Step 4: Simplify right side
    39,219.90x = 1,153,632,693.72
  5. Step 5: Solve for x
    x = 1,153,632,693.72/39,219.90
  6. Step 6: Final answer
    x = 29,414.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.