Home / 21,423.42-29,557.17-13,879.35

Finding the Fourth Proportional to 21,423.42, 29,557.17 and 13,879.35

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Solution

The fourth proportional to 21,423.42, 29,557.17 and 13,879.35 is: 19,148.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.42 : 29,557.17 = 13,879.35 : x
  2. Step 2: Convert to fraction form
    21,423.42/29,557.17 = 13,879.35/x
  3. Step 3: Cross multiply
    21,423.42x = 29,557.17 × 13,879.35
  4. Step 4: Simplify right side
    21,423.42x = 410,234,307.44
  5. Step 5: Solve for x
    x = 410,234,307.44/21,423.42
  6. Step 6: Final answer
    x = 19,148.87

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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.