Home / 13,356.68-18,431.67-7,691.63

Finding the Fourth Proportional to 13,356.68, 18,431.67 and 7,691.63

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Solution

The fourth proportional to 13,356.68, 18,431.67 and 7,691.63 is: 10,614.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.68 : 18,431.67 = 7,691.63 : x
  2. Step 2: Convert to fraction form
    13,356.68/18,431.67 = 7,691.63/x
  3. Step 3: Cross multiply
    13,356.68x = 18,431.67 × 7,691.63
  4. Step 4: Simplify right side
    13,356.68x = 141,769,522.61
  5. Step 5: Solve for x
    x = 141,769,522.61/13,356.68
  6. Step 6: Final answer
    x = 10,614.13

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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.