Home / 21,726.40-29,980.65-12,774.28

Finding the Fourth Proportional to 21,726.40, 29,980.65 and 12,774.28

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Solution

The fourth proportional to 21,726.40, 29,980.65 and 12,774.28 is: 17,627.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.40 : 29,980.65 = 12,774.28 : x
  2. Step 2: Convert to fraction form
    21,726.40/29,980.65 = 12,774.28/x
  3. Step 3: Cross multiply
    21,726.40x = 29,980.65 × 12,774.28
  4. Step 4: Simplify right side
    21,726.40x = 382,981,217.68
  5. Step 5: Solve for x
    x = 382,981,217.68/21,726.40
  6. Step 6: Final answer
    x = 17,627.46

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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.