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Finding the Fourth Proportional to 28,159.88, 38,869.29 and 16,231.19

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Solution

The fourth proportional to 28,159.88, 38,869.29 and 16,231.19 is: 22,404.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.88 : 38,869.29 = 16,231.19 : x
  2. Step 2: Convert to fraction form
    28,159.88/38,869.29 = 16,231.19/x
  3. Step 3: Cross multiply
    28,159.88x = 38,869.29 × 16,231.19
  4. Step 4: Simplify right side
    28,159.88x = 630,894,636.81
  5. Step 5: Solve for x
    x = 630,894,636.81/28,159.88
  6. Step 6: Final answer
    x = 22,404.03

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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.