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Finding the Fourth Proportional to 15,356.62, 21,191.92 and 8,987.59

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Solution

The fourth proportional to 15,356.62, 21,191.92 and 8,987.59 is: 12,402.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.62 : 21,191.92 = 8,987.59 : x
  2. Step 2: Convert to fraction form
    15,356.62/21,191.92 = 8,987.59/x
  3. Step 3: Cross multiply
    15,356.62x = 21,191.92 × 8,987.59
  4. Step 4: Simplify right side
    15,356.62x = 190,464,288.27
  5. Step 5: Solve for x
    x = 190,464,288.27/15,356.62
  6. Step 6: Final answer
    x = 12,402.75

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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.