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Finding the Fourth Proportional to 21,001.30, 31,503.08 and 8,519.46

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Solution

The fourth proportional to 21,001.30, 31,503.08 and 8,519.46 is: 12,779.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.30 : 31,503.08 = 8,519.46 : x
  2. Step 2: Convert to fraction form
    21,001.30/31,503.08 = 8,519.46/x
  3. Step 3: Cross multiply
    21,001.30x = 31,503.08 × 8,519.46
  4. Step 4: Simplify right side
    21,001.30x = 268,389,229.94
  5. Step 5: Solve for x
    x = 268,389,229.94/21,001.30
  6. Step 6: Final answer
    x = 12,779.65

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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.