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Finding the Fourth Proportional to 15,191.18, 20,964.86 and 8,478.10

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Solution

The fourth proportional to 15,191.18, 20,964.86 and 8,478.10 is: 11,700.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.18 : 20,964.86 = 8,478.10 : x
  2. Step 2: Convert to fraction form
    15,191.18/20,964.86 = 8,478.10/x
  3. Step 3: Cross multiply
    15,191.18x = 20,964.86 × 8,478.10
  4. Step 4: Simplify right side
    15,191.18x = 177,742,179.57
  5. Step 5: Solve for x
    x = 177,742,179.57/15,191.18
  6. Step 6: Final answer
    x = 11,700.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.