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Finding the Fourth Proportional to 8,886.40, 13,358.40 and 7,619.20

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Solution

The fourth proportional to 8,886.40, 13,358.40 and 7,619.20 is: 11,453.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,886.40 : 13,358.40 = 7,619.20 : x
  2. Step 2: Convert to fraction form
    8,886.40/13,358.40 = 7,619.20/x
  3. Step 3: Cross multiply
    8,886.40x = 13,358.40 × 7,619.20
  4. Step 4: Simplify right side
    8,886.40x = 101,780,321.28
  5. Step 5: Solve for x
    x = 101,780,321.28/8,886.40
  6. Step 6: Final answer
    x = 11,453.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.