Home / 13,146.30-18,140.76-7,839.99

Finding the Fourth Proportional to 13,146.30, 18,140.76 and 7,839.99

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Solution

The fourth proportional to 13,146.30, 18,140.76 and 7,839.99 is: 10,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.30 : 18,140.76 = 7,839.99 : x
  2. Step 2: Convert to fraction form
    13,146.30/18,140.76 = 7,839.99/x
  3. Step 3: Cross multiply
    13,146.30x = 18,140.76 × 7,839.99
  4. Step 4: Simplify right side
    13,146.30x = 142,223,376.99
  5. Step 5: Solve for x
    x = 142,223,376.99/13,146.30
  6. Step 6: Final answer
    x = 10,818.51

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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.