Home / 21,972.16-30,314.40-12,538.88

Finding the Fourth Proportional to 21,972.16, 30,314.40 and 12,538.88

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Solution

The fourth proportional to 21,972.16, 30,314.40 and 12,538.88 is: 17,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.16 : 30,314.40 = 12,538.88 : x
  2. Step 2: Convert to fraction form
    21,972.16/30,314.40 = 12,538.88/x
  3. Step 3: Cross multiply
    21,972.16x = 30,314.40 × 12,538.88
  4. Step 4: Simplify right side
    21,972.16x = 380,108,623.87
  5. Step 5: Solve for x
    x = 380,108,623.87/21,972.16
  6. Step 6: Final answer
    x = 17,299.56

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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.