Home / 21,968.71-30,319.28-12,538.87

Finding the Fourth Proportional to 21,968.71, 30,319.28 and 12,538.87

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Solution

The fourth proportional to 21,968.71, 30,319.28 and 12,538.87 is: 17,305.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.71 : 30,319.28 = 12,538.87 : x
  2. Step 2: Convert to fraction form
    21,968.71/30,319.28 = 12,538.87/x
  3. Step 3: Cross multiply
    21,968.71x = 30,319.28 × 12,538.87
  4. Step 4: Simplify right side
    21,968.71x = 380,169,447.72
  5. Step 5: Solve for x
    x = 380,169,447.72/21,968.71
  6. Step 6: Final answer
    x = 17,305.04

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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.