Home / 21,234.20-29,225.84-18,699.72

Finding the Fourth Proportional to 21,234.20, 29,225.84 and 18,699.72

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Solution

The fourth proportional to 21,234.20, 29,225.84 and 18,699.72 is: 25,737.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.20 : 29,225.84 = 18,699.72 : x
  2. Step 2: Convert to fraction form
    21,234.20/29,225.84 = 18,699.72/x
  3. Step 3: Cross multiply
    21,234.20x = 29,225.84 × 18,699.72
  4. Step 4: Simplify right side
    21,234.20x = 546,515,024.76
  5. Step 5: Solve for x
    x = 546,515,024.76/21,234.20
  6. Step 6: Final answer
    x = 25,737.49

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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.