Home / 21,082.80-31,474.50-18,750

Finding the Fourth Proportional to 21,082.80, 31,474.50 and 18,750

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Solution

The fourth proportional to 21,082.80, 31,474.50 and 18,750 is: 27,991.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082.80 : 31,474.50 = 18,750 : x
  2. Step 2: Convert to fraction form
    21,082.80/31,474.50 = 18,750/x
  3. Step 3: Cross multiply
    21,082.80x = 31,474.50 × 18,750
  4. Step 4: Simplify right side
    21,082.80x = 590,146,875
  5. Step 5: Solve for x
    x = 590,146,875/21,082.80
  6. Step 6: Final answer
    x = 27,991.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.