Home / 13,125.06-18,112.47-7,156.61

Finding the Fourth Proportional to 13,125.06, 18,112.47 and 7,156.61

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Solution

The fourth proportional to 13,125.06, 18,112.47 and 7,156.61 is: 9,876.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.06 : 18,112.47 = 7,156.61 : x
  2. Step 2: Convert to fraction form
    13,125.06/18,112.47 = 7,156.61/x
  3. Step 3: Cross multiply
    13,125.06x = 18,112.47 × 7,156.61
  4. Step 4: Simplify right side
    13,125.06x = 129,623,793.36
  5. Step 5: Solve for x
    x = 129,623,793.36/13,125.06
  6. Step 6: Final answer
    x = 9,876.05

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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.