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Finding the Fourth Proportional to 20,726.16, 28,613.04 and 16,648.80

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Solution

The fourth proportional to 20,726.16, 28,613.04 and 16,648.80 is: 22,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.16 : 28,613.04 = 16,648.80 : x
  2. Step 2: Convert to fraction form
    20,726.16/28,613.04 = 16,648.80/x
  3. Step 3: Cross multiply
    20,726.16x = 28,613.04 × 16,648.80
  4. Step 4: Simplify right side
    20,726.16x = 476,372,780.35
  5. Step 5: Solve for x
    x = 476,372,780.35/20,726.16
  6. Step 6: Final answer
    x = 22,984.13

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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.