Home / 21,131.52-29,159.46-12,631.95

Finding the Fourth Proportional to 21,131.52, 29,159.46 and 12,631.95

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Solution

The fourth proportional to 21,131.52, 29,159.46 and 12,631.95 is: 17,430.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.52 : 29,159.46 = 12,631.95 : x
  2. Step 2: Convert to fraction form
    21,131.52/29,159.46 = 12,631.95/x
  3. Step 3: Cross multiply
    21,131.52x = 29,159.46 × 12,631.95
  4. Step 4: Simplify right side
    21,131.52x = 368,340,840.75
  5. Step 5: Solve for x
    x = 368,340,840.75/21,131.52
  6. Step 6: Final answer
    x = 17,430.87

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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.