Home / 28,557.32-39,407.82-15,809.61

Finding the Fourth Proportional to 28,557.32, 39,407.82 and 15,809.61

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Solution

The fourth proportional to 28,557.32, 39,407.82 and 15,809.61 is: 21,816.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.32 : 39,407.82 = 15,809.61 : x
  2. Step 2: Convert to fraction form
    28,557.32/39,407.82 = 15,809.61/x
  3. Step 3: Cross multiply
    28,557.32x = 39,407.82 × 15,809.61
  4. Step 4: Simplify right side
    28,557.32x = 623,022,021.14
  5. Step 5: Solve for x
    x = 623,022,021.14/28,557.32
  6. Step 6: Final answer
    x = 21,816.55

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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.