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Finding the Fourth Proportional to 8,788.40, 13,166.40 and 7,395.20

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Solution

The fourth proportional to 8,788.40, 13,166.40 and 7,395.20 is: 11,079.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.40 : 13,166.40 = 7,395.20 : x
  2. Step 2: Convert to fraction form
    8,788.40/13,166.40 = 7,395.20/x
  3. Step 3: Cross multiply
    8,788.40x = 13,166.40 × 7,395.20
  4. Step 4: Simplify right side
    8,788.40x = 97,368,161.28
  5. Step 5: Solve for x
    x = 97,368,161.28/8,788.40
  6. Step 6: Final answer
    x = 11,079.17

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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.