Home / 21,335.28-29,438.72-12,379.52

Finding the Fourth Proportional to 21,335.28, 29,438.72 and 12,379.52

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Solution

The fourth proportional to 21,335.28, 29,438.72 and 12,379.52 is: 17,081.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.28 : 29,438.72 = 12,379.52 : x
  2. Step 2: Convert to fraction form
    21,335.28/29,438.72 = 12,379.52/x
  3. Step 3: Cross multiply
    21,335.28x = 29,438.72 × 12,379.52
  4. Step 4: Simplify right side
    21,335.28x = 364,437,223.01
  5. Step 5: Solve for x
    x = 364,437,223.01/21,335.28
  6. Step 6: Final answer
    x = 17,081.44

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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.