Home / 21,820.12-30,123.19-14,687.56

Finding the Fourth Proportional to 21,820.12, 30,123.19 and 14,687.56

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Solution

The fourth proportional to 21,820.12, 30,123.19 and 14,687.56 is: 20,276.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,820.12 : 30,123.19 = 14,687.56 : x
  2. Step 2: Convert to fraction form
    21,820.12/30,123.19 = 14,687.56/x
  3. Step 3: Cross multiply
    21,820.12x = 30,123.19 × 14,687.56
  4. Step 4: Simplify right side
    21,820.12x = 442,436,216.53
  5. Step 5: Solve for x
    x = 442,436,216.53/21,820.12
  6. Step 6: Final answer
    x = 20,276.53

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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.