Home / 21,276.52-29,378.82-13,726.60

Finding the Fourth Proportional to 21,276.52, 29,378.82 and 13,726.60

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Solution

The fourth proportional to 21,276.52, 29,378.82 and 13,726.60 is: 18,953.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.52 : 29,378.82 = 13,726.60 : x
  2. Step 2: Convert to fraction form
    21,276.52/29,378.82 = 13,726.60/x
  3. Step 3: Cross multiply
    21,276.52x = 29,378.82 × 13,726.60
  4. Step 4: Simplify right side
    21,276.52x = 403,271,310.61
  5. Step 5: Solve for x
    x = 403,271,310.61/21,276.52
  6. Step 6: Final answer
    x = 18,953.82

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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.