Home / 21,375.36-31,985.28-17,642.88

Finding the Fourth Proportional to 21,375.36, 31,985.28 and 17,642.88

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Solution

The fourth proportional to 21,375.36, 31,985.28 and 17,642.88 is: 26,400.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.36 : 31,985.28 = 17,642.88 : x
  2. Step 2: Convert to fraction form
    21,375.36/31,985.28 = 17,642.88/x
  3. Step 3: Cross multiply
    21,375.36x = 31,985.28 × 17,642.88
  4. Step 4: Simplify right side
    21,375.36x = 564,312,456.81
  5. Step 5: Solve for x
    x = 564,312,456.81/21,375.36
  6. Step 6: Final answer
    x = 26,400.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.