Home / 10,257.10-15,349.20-7,122.40

Finding the Fourth Proportional to 10,257.10, 15,349.20 and 7,122.40

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Solution

The fourth proportional to 10,257.10, 15,349.20 and 7,122.40 is: 10,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,257.10 : 15,349.20 = 7,122.40 : x
  2. Step 2: Convert to fraction form
    10,257.10/15,349.20 = 7,122.40/x
  3. Step 3: Cross multiply
    10,257.10x = 15,349.20 × 7,122.40
  4. Step 4: Simplify right side
    10,257.10x = 109,323,142.08
  5. Step 5: Solve for x
    x = 109,323,142.08/10,257.10
  6. Step 6: Final answer
    x = 10,658.29

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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.