Home / 12,428.91-17,153.10-7,125.30

Finding the Fourth Proportional to 12,428.91, 17,153.10 and 7,125.30

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Solution

The fourth proportional to 12,428.91, 17,153.10 and 7,125.30 is: 9,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.91 : 17,153.10 = 7,125.30 : x
  2. Step 2: Convert to fraction form
    12,428.91/17,153.10 = 7,125.30/x
  3. Step 3: Cross multiply
    12,428.91x = 17,153.10 × 7,125.30
  4. Step 4: Simplify right side
    12,428.91x = 122,220,983.43
  5. Step 5: Solve for x
    x = 122,220,983.43/12,428.91
  6. Step 6: Final answer
    x = 9,833.60

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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.