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Finding the Fourth Proportional to 20,312.01, 30,456.76 and 8,312.59

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Solution

The fourth proportional to 20,312.01, 30,456.76 and 8,312.59 is: 12,464.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.01 : 30,456.76 = 8,312.59 : x
  2. Step 2: Convert to fraction form
    20,312.01/30,456.76 = 8,312.59/x
  3. Step 3: Cross multiply
    20,312.01x = 30,456.76 × 8,312.59
  4. Step 4: Simplify right side
    20,312.01x = 253,174,558.61
  5. Step 5: Solve for x
    x = 253,174,558.61/20,312.01
  6. Step 6: Final answer
    x = 12,464.28

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1.5x scale

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.