Home / 21,854.59-30,159.06-12,422.54

Finding the Fourth Proportional to 21,854.59, 30,159.06 and 12,422.54

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Solution

The fourth proportional to 21,854.59, 30,159.06 and 12,422.54 is: 17,142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.59 : 30,159.06 = 12,422.54 : x
  2. Step 2: Convert to fraction form
    21,854.59/30,159.06 = 12,422.54/x
  3. Step 3: Cross multiply
    21,854.59x = 30,159.06 × 12,422.54
  4. Step 4: Simplify right side
    21,854.59x = 374,652,129.21
  5. Step 5: Solve for x
    x = 374,652,129.21/21,854.59
  6. Step 6: Final answer
    x = 17,142.95

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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.