Home / 21,145.39-29,160.54-12,646.13

Finding the Fourth Proportional to 21,145.39, 29,160.54 and 12,646.13

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Solution

The fourth proportional to 21,145.39, 29,160.54 and 12,646.13 is: 17,439.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.39 : 29,160.54 = 12,646.13 : x
  2. Step 2: Convert to fraction form
    21,145.39/29,160.54 = 12,646.13/x
  3. Step 3: Cross multiply
    21,145.39x = 29,160.54 × 12,646.13
  4. Step 4: Simplify right side
    21,145.39x = 368,767,833.91
  5. Step 5: Solve for x
    x = 368,767,833.91/21,145.39
  6. Step 6: Final answer
    x = 17,439.63

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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.