Home / 20,875.52-31,312.98-5,293.15

Finding the Fourth Proportional to 20,875.52, 31,312.98 and 5,293.15

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Solution

The fourth proportional to 20,875.52, 31,312.98 and 5,293.15 is: 7,939.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.52 : 31,312.98 = 5,293.15 : x
  2. Step 2: Convert to fraction form
    20,875.52/31,312.98 = 5,293.15/x
  3. Step 3: Cross multiply
    20,875.52x = 31,312.98 × 5,293.15
  4. Step 4: Simplify right side
    20,875.52x = 165,744,221.80
  5. Step 5: Solve for x
    x = 165,744,221.80/20,875.52
  6. Step 6: Final answer
    x = 7,939.64

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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.