Home / 13,140.75-18,129.48-10,116.79

Finding the Fourth Proportional to 13,140.75, 18,129.48 and 10,116.79

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Solution

The fourth proportional to 13,140.75, 18,129.48 and 10,116.79 is: 13,957.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.75 : 18,129.48 = 10,116.79 : x
  2. Step 2: Convert to fraction form
    13,140.75/18,129.48 = 10,116.79/x
  3. Step 3: Cross multiply
    13,140.75x = 18,129.48 × 10,116.79
  4. Step 4: Simplify right side
    13,140.75x = 183,412,141.97
  5. Step 5: Solve for x
    x = 183,412,141.97/13,140.75
  6. Step 6: Final answer
    x = 13,957.51

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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.