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Finding the Fourth Proportional to 8,931.10, 12,325.22 and 5,393.61

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Solution

The fourth proportional to 8,931.10, 12,325.22 and 5,393.61 is: 7,443.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.10 : 12,325.22 = 5,393.61 : x
  2. Step 2: Convert to fraction form
    8,931.10/12,325.22 = 5,393.61/x
  3. Step 3: Cross multiply
    8,931.10x = 12,325.22 × 5,393.61
  4. Step 4: Simplify right side
    8,931.10x = 66,477,429.84
  5. Step 5: Solve for x
    x = 66,477,429.84/8,931.10
  6. Step 6: Final answer
    x = 7,443.36

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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.