Home / 13,125.62-18,113.00-7,157.28

Finding the Fourth Proportional to 13,125.62, 18,113.00 and 7,157.28

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Solution

The fourth proportional to 13,125.62, 18,113.00 and 7,157.28 is: 9,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.62 : 18,113.00 = 7,157.28 : x
  2. Step 2: Convert to fraction form
    13,125.62/18,113.00 = 7,157.28/x
  3. Step 3: Cross multiply
    13,125.62x = 18,113.00 × 7,157.28
  4. Step 4: Simplify right side
    13,125.62x = 129,639,776.85
  5. Step 5: Solve for x
    x = 129,639,776.85/13,125.62
  6. Step 6: Final answer
    x = 9,876.85

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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.