Home / 28,521-39,359.82-15,945.78

Finding the Fourth Proportional to 28,521, 39,359.82 and 15,945.78

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Solution

The fourth proportional to 28,521, 39,359.82 and 15,945.78 is: 22,005.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521 : 39,359.82 = 15,945.78 : x
  2. Step 2: Convert to fraction form
    28,521/39,359.82 = 15,945.78/x
  3. Step 3: Cross multiply
    28,521x = 39,359.82 × 15,945.78
  4. Step 4: Simplify right side
    28,521x = 627,623,030.56
  5. Step 5: Solve for x
    x = 627,623,030.56/28,521
  6. Step 6: Final answer
    x = 22,005.65

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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.