Home / 21,472.11-29,615.49-20,529.81

Finding the Fourth Proportional to 21,472.11, 29,615.49 and 20,529.81

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Solution

The fourth proportional to 21,472.11, 29,615.49 and 20,529.81 is: 28,315.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.11 : 29,615.49 = 20,529.81 : x
  2. Step 2: Convert to fraction form
    21,472.11/29,615.49 = 20,529.81/x
  3. Step 3: Cross multiply
    21,472.11x = 29,615.49 × 20,529.81
  4. Step 4: Simplify right side
    21,472.11x = 608,000,382.76
  5. Step 5: Solve for x
    x = 608,000,382.76/21,472.11
  6. Step 6: Final answer
    x = 28,315.82

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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.