Home / 13,125.00-18,112.10-7,156.78

Finding the Fourth Proportional to 13,125.00, 18,112.10 and 7,156.78

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Solution

The fourth proportional to 13,125.00, 18,112.10 and 7,156.78 is: 9,876.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.00 : 18,112.10 = 7,156.78 : x
  2. Step 2: Convert to fraction form
    13,125.00/18,112.10 = 7,156.78/x
  3. Step 3: Cross multiply
    13,125.00x = 18,112.10 × 7,156.78
  4. Step 4: Simplify right side
    13,125.00x = 129,624,328.73
  5. Step 5: Solve for x
    x = 129,624,328.73/13,125.00
  6. Step 6: Final answer
    x = 9,876.14

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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.