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Finding the Fourth Proportional to 14,865.80, 20,514.53 and 8,151.30

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Solution

The fourth proportional to 14,865.80, 20,514.53 and 8,151.30 is: 11,248.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,865.80 : 20,514.53 = 8,151.30 : x
  2. Step 2: Convert to fraction form
    14,865.80/20,514.53 = 8,151.30/x
  3. Step 3: Cross multiply
    14,865.80x = 20,514.53 × 8,151.30
  4. Step 4: Simplify right side
    14,865.80x = 167,220,108.77
  5. Step 5: Solve for x
    x = 167,220,108.77/14,865.80
  6. Step 6: Final answer
    x = 11,248.65

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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.