Home / 21,542.77-29,729.02-12,111.40

Finding the Fourth Proportional to 21,542.77, 29,729.02 and 12,111.40

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Solution

The fourth proportional to 21,542.77, 29,729.02 and 12,111.40 is: 16,713.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,542.77 : 29,729.02 = 12,111.40 : x
  2. Step 2: Convert to fraction form
    21,542.77/29,729.02 = 12,111.40/x
  3. Step 3: Cross multiply
    21,542.77x = 29,729.02 × 12,111.40
  4. Step 4: Simplify right side
    21,542.77x = 360,059,881.13
  5. Step 5: Solve for x
    x = 360,059,881.13/21,542.77
  6. Step 6: Final answer
    x = 16,713.73

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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.