Home / 21,141.76-29,173.68-12,642.24

Finding the Fourth Proportional to 21,141.76, 29,173.68 and 12,642.24

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Solution

The fourth proportional to 21,141.76, 29,173.68 and 12,642.24 is: 17,445.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.76 : 29,173.68 = 12,642.24 : x
  2. Step 2: Convert to fraction form
    21,141.76/29,173.68 = 12,642.24/x
  3. Step 3: Cross multiply
    21,141.76x = 29,173.68 × 12,642.24
  4. Step 4: Simplify right side
    21,141.76x = 368,820,664.24
  5. Step 5: Solve for x
    x = 368,820,664.24/21,141.76
  6. Step 6: Final answer
    x = 17,445.13

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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.