Home / 15,318.66-21,139.29-8,604.30

Finding the Fourth Proportional to 15,318.66, 21,139.29 and 8,604.30

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Solution

The fourth proportional to 15,318.66, 21,139.29 and 8,604.30 is: 11,873.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.66 : 21,139.29 = 8,604.30 : x
  2. Step 2: Convert to fraction form
    15,318.66/21,139.29 = 8,604.30/x
  3. Step 3: Cross multiply
    15,318.66x = 21,139.29 × 8,604.30
  4. Step 4: Simplify right side
    15,318.66x = 181,888,792.95
  5. Step 5: Solve for x
    x = 181,888,792.95/15,318.66
  6. Step 6: Final answer
    x = 11,873.68

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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.