Home / 56,285.28-84,378.24-21,200.40

Finding the Fourth Proportional to 56,285.28, 84,378.24 and 21,200.40

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Solution

The fourth proportional to 56,285.28, 84,378.24 and 21,200.40 is: 31,781.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,285.28 : 84,378.24 = 21,200.40 : x
  2. Step 2: Convert to fraction form
    56,285.28/84,378.24 = 21,200.40/x
  3. Step 3: Cross multiply
    56,285.28x = 84,378.24 × 21,200.40
  4. Step 4: Simplify right side
    56,285.28x = 1,788,852,439.30
  5. Step 5: Solve for x
    x = 1,788,852,439.30/56,285.28
  6. Step 6: Final answer
    x = 31,781.89

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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.