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Finding the Fourth Proportional to 13,045.60, 18,001.74 and 7,380.86

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Solution

The fourth proportional to 13,045.60, 18,001.74 and 7,380.86 is: 10,184.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,045.60 : 18,001.74 = 7,380.86 : x
  2. Step 2: Convert to fraction form
    13,045.60/18,001.74 = 7,380.86/x
  3. Step 3: Cross multiply
    13,045.60x = 18,001.74 × 7,380.86
  4. Step 4: Simplify right side
    13,045.60x = 132,868,322.70
  5. Step 5: Solve for x
    x = 132,868,322.70/13,045.60
  6. Step 6: Final answer
    x = 10,184.91

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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.