Home / 13,631.63-18,815.02-8,330.92

Finding the Fourth Proportional to 13,631.63, 18,815.02 and 8,330.92

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Solution

The fourth proportional to 13,631.63, 18,815.02 and 8,330.92 is: 11,498.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.63 : 18,815.02 = 8,330.92 : x
  2. Step 2: Convert to fraction form
    13,631.63/18,815.02 = 8,330.92/x
  3. Step 3: Cross multiply
    13,631.63x = 18,815.02 × 8,330.92
  4. Step 4: Simplify right side
    13,631.63x = 156,746,358.55
  5. Step 5: Solve for x
    x = 156,746,358.55/13,631.63
  6. Step 6: Final answer
    x = 11,498.73

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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.