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Finding the Fourth Proportional to 13,659.76, 18,851.88 and 8,358.10

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Solution

The fourth proportional to 13,659.76, 18,851.88 and 8,358.10 is: 11,535.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.76 : 18,851.88 = 8,358.10 : x
  2. Step 2: Convert to fraction form
    13,659.76/18,851.88 = 8,358.10/x
  3. Step 3: Cross multiply
    13,659.76x = 18,851.88 × 8,358.10
  4. Step 4: Simplify right side
    13,659.76x = 157,565,898.23
  5. Step 5: Solve for x
    x = 157,565,898.23/13,659.76
  6. Step 6: Final answer
    x = 11,535.04

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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.