Home / 15,438.53-21,305.13-8,364.97

Finding the Fourth Proportional to 15,438.53, 21,305.13 and 8,364.97

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Solution

The fourth proportional to 15,438.53, 21,305.13 and 8,364.97 is: 11,543.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.53 : 21,305.13 = 8,364.97 : x
  2. Step 2: Convert to fraction form
    15,438.53/21,305.13 = 8,364.97/x
  3. Step 3: Cross multiply
    15,438.53x = 21,305.13 × 8,364.97
  4. Step 4: Simplify right side
    15,438.53x = 178,216,773.30
  5. Step 5: Solve for x
    x = 178,216,773.30/15,438.53
  6. Step 6: Final answer
    x = 11,543.64

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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.