Home / 20,012.49-27,618.29-11,515.90

Finding the Fourth Proportional to 20,012.49, 27,618.29 and 11,515.90

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Solution

The fourth proportional to 20,012.49, 27,618.29 and 11,515.90 is: 15,892.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.49 : 27,618.29 = 11,515.90 : x
  2. Step 2: Convert to fraction form
    20,012.49/27,618.29 = 11,515.90/x
  3. Step 3: Cross multiply
    20,012.49x = 27,618.29 × 11,515.90
  4. Step 4: Simplify right side
    20,012.49x = 318,049,465.81
  5. Step 5: Solve for x
    x = 318,049,465.81/20,012.49
  6. Step 6: Final answer
    x = 15,892.55

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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.