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Finding the Fourth Proportional to 15,009.71, 20,711.60 and 8,958.83

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Solution

The fourth proportional to 15,009.71, 20,711.60 and 8,958.83 is: 12,362.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.71 : 20,711.60 = 8,958.83 : x
  2. Step 2: Convert to fraction form
    15,009.71/20,711.60 = 8,958.83/x
  3. Step 3: Cross multiply
    15,009.71x = 20,711.60 × 8,958.83
  4. Step 4: Simplify right side
    15,009.71x = 185,551,555.08
  5. Step 5: Solve for x
    x = 185,551,555.08/15,009.71
  6. Step 6: Final answer
    x = 12,362.11

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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.