Home / 21,686.20-29,926.56-12,254.56

Finding the Fourth Proportional to 21,686.20, 29,926.56 and 12,254.56

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Solution

The fourth proportional to 21,686.20, 29,926.56 and 12,254.56 is: 16,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.20 : 29,926.56 = 12,254.56 : x
  2. Step 2: Convert to fraction form
    21,686.20/29,926.56 = 12,254.56/x
  3. Step 3: Cross multiply
    21,686.20x = 29,926.56 × 12,254.56
  4. Step 4: Simplify right side
    21,686.20x = 366,736,750.30
  5. Step 5: Solve for x
    x = 366,736,750.30/21,686.20
  6. Step 6: Final answer
    x = 16,911.07

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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.