Home / 28,406.80-39,272.25-21,320.92

Finding the Fourth Proportional to 28,406.80, 39,272.25 and 21,320.92

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Solution

The fourth proportional to 28,406.80, 39,272.25 and 21,320.92 is: 29,476.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.80 : 39,272.25 = 21,320.92 : x
  2. Step 2: Convert to fraction form
    28,406.80/39,272.25 = 21,320.92/x
  3. Step 3: Cross multiply
    28,406.80x = 39,272.25 × 21,320.92
  4. Step 4: Simplify right side
    28,406.80x = 837,320,500.47
  5. Step 5: Solve for x
    x = 837,320,500.47/28,406.80
  6. Step 6: Final answer
    x = 29,476.06

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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.