Home / 21,287.88-29,377.26-12,340.58

Finding the Fourth Proportional to 21,287.88, 29,377.26 and 12,340.58

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Solution

The fourth proportional to 21,287.88, 29,377.26 and 12,340.58 is: 17,029.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.88 : 29,377.26 = 12,340.58 : x
  2. Step 2: Convert to fraction form
    21,287.88/29,377.26 = 12,340.58/x
  3. Step 3: Cross multiply
    21,287.88x = 29,377.26 × 12,340.58
  4. Step 4: Simplify right side
    21,287.88x = 362,532,280.32
  5. Step 5: Solve for x
    x = 362,532,280.32/21,287.88
  6. Step 6: Final answer
    x = 17,029.99

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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.