Home / 8,974.30-12,385.40-5,440

Finding the Fourth Proportional to 8,974.30, 12,385.40 and 5,440

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Solution

The fourth proportional to 8,974.30, 12,385.40 and 5,440 is: 7,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.30 : 12,385.40 = 5,440 : x
  2. Step 2: Convert to fraction form
    8,974.30/12,385.40 = 5,440/x
  3. Step 3: Cross multiply
    8,974.30x = 12,385.40 × 5,440
  4. Step 4: Simplify right side
    8,974.30x = 67,376,576
  5. Step 5: Solve for x
    x = 67,376,576/8,974.30
  6. Step 6: Final answer
    x = 7,507.72

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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.