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Finding the Fourth Proportional to 8,368.90, 12,551.24 and 3,439.90

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Solution

The fourth proportional to 8,368.90, 12,551.24 and 3,439.90 is: 5,158.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368.90 : 12,551.24 = 3,439.90 : x
  2. Step 2: Convert to fraction form
    8,368.90/12,551.24 = 3,439.90/x
  3. Step 3: Cross multiply
    8,368.90x = 12,551.24 × 3,439.90
  4. Step 4: Simplify right side
    8,368.90x = 43,175,010.48
  5. Step 5: Solve for x
    x = 43,175,010.48/8,368.90
  6. Step 6: Final answer
    x = 5,158.98

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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.