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Finding the Fourth Proportional to 15,158.89, 20,909.25 and 9,483.79

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Solution

The fourth proportional to 15,158.89, 20,909.25 and 9,483.79 is: 13,081.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.89 : 20,909.25 = 9,483.79 : x
  2. Step 2: Convert to fraction form
    15,158.89/20,909.25 = 9,483.79/x
  3. Step 3: Cross multiply
    15,158.89x = 20,909.25 × 9,483.79
  4. Step 4: Simplify right side
    15,158.89x = 198,298,888.64
  5. Step 5: Solve for x
    x = 198,298,888.64/15,158.89
  6. Step 6: Final answer
    x = 13,081.36

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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.