Home / 21,254.40-29,330.40-11,822.88

Finding the Fourth Proportional to 21,254.40, 29,330.40 and 11,822.88

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Solution

The fourth proportional to 21,254.40, 29,330.40 and 11,822.88 is: 16,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.40 : 29,330.40 = 11,822.88 : x
  2. Step 2: Convert to fraction form
    21,254.40/29,330.40 = 11,822.88/x
  3. Step 3: Cross multiply
    21,254.40x = 29,330.40 × 11,822.88
  4. Step 4: Simplify right side
    21,254.40x = 346,769,799.55
  5. Step 5: Solve for x
    x = 346,769,799.55/21,254.40
  6. Step 6: Final answer
    x = 16,315.20

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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.