Home / 21,531.20-29,726.88-19,405.76

Finding the Fourth Proportional to 21,531.20, 29,726.88 and 19,405.76

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Solution

The fourth proportional to 21,531.20, 29,726.88 and 19,405.76 is: 26,792.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.20 : 29,726.88 = 19,405.76 : x
  2. Step 2: Convert to fraction form
    21,531.20/29,726.88 = 19,405.76/x
  3. Step 3: Cross multiply
    21,531.20x = 29,726.88 × 19,405.76
  4. Step 4: Simplify right side
    21,531.20x = 576,872,698.83
  5. Step 5: Solve for x
    x = 576,872,698.83/21,531.20
  6. Step 6: Final answer
    x = 26,792.41

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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.