Home / 21,799.17-30,079.47-12,239.55

Finding the Fourth Proportional to 21,799.17, 30,079.47 and 12,239.55

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Solution

The fourth proportional to 21,799.17, 30,079.47 and 12,239.55 is: 16,888.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,799.17 : 30,079.47 = 12,239.55 : x
  2. Step 2: Convert to fraction form
    21,799.17/30,079.47 = 12,239.55/x
  3. Step 3: Cross multiply
    21,799.17x = 30,079.47 × 12,239.55
  4. Step 4: Simplify right side
    21,799.17x = 368,159,177.04
  5. Step 5: Solve for x
    x = 368,159,177.04/21,799.17
  6. Step 6: Final answer
    x = 16,888.68

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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.