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Finding the Fourth Proportional to 15,191.93, 20,964.15 and 11,211.59

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Solution

The fourth proportional to 15,191.93, 20,964.15 and 11,211.59 is: 15,471.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.93 : 20,964.15 = 11,211.59 : x
  2. Step 2: Convert to fraction form
    15,191.93/20,964.15 = 11,211.59/x
  3. Step 3: Cross multiply
    15,191.93x = 20,964.15 × 11,211.59
  4. Step 4: Simplify right side
    15,191.93x = 235,041,454.50
  5. Step 5: Solve for x
    x = 235,041,454.50/15,191.93
  6. Step 6: Final answer
    x = 15,471.47

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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.