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Finding the Fourth Proportional to 15,159.17, 20,919.36 and 8,445.35

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Solution

The fourth proportional to 15,159.17, 20,919.36 and 8,445.35 is: 11,654.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,159.17 : 20,919.36 = 8,445.35 : x
  2. Step 2: Convert to fraction form
    15,159.17/20,919.36 = 8,445.35/x
  3. Step 3: Cross multiply
    15,159.17x = 20,919.36 × 8,445.35
  4. Step 4: Simplify right side
    15,159.17x = 176,671,316.98
  5. Step 5: Solve for x
    x = 176,671,316.98/15,159.17
  6. Step 6: Final answer
    x = 11,654.42

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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.