Home / 21,639.36-32,472.48-13,853.76

Finding the Fourth Proportional to 21,639.36, 32,472.48 and 13,853.76

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Solution

The fourth proportional to 21,639.36, 32,472.48 and 13,853.76 is: 20,789.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.36 : 32,472.48 = 13,853.76 : x
  2. Step 2: Convert to fraction form
    21,639.36/32,472.48 = 13,853.76/x
  3. Step 3: Cross multiply
    21,639.36x = 32,472.48 × 13,853.76
  4. Step 4: Simplify right side
    21,639.36x = 449,865,944.52
  5. Step 5: Solve for x
    x = 449,865,944.52/21,639.36
  6. Step 6: Final answer
    x = 20,789.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.