Home / 20,478.31-28,269.27-15,444.56

Finding the Fourth Proportional to 20,478.31, 28,269.27 and 15,444.56

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Solution

The fourth proportional to 20,478.31, 28,269.27 and 15,444.56 is: 21,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.31 : 28,269.27 = 15,444.56 : x
  2. Step 2: Convert to fraction form
    20,478.31/28,269.27 = 15,444.56/x
  3. Step 3: Cross multiply
    20,478.31x = 28,269.27 × 15,444.56
  4. Step 4: Simplify right side
    20,478.31x = 436,606,436.67
  5. Step 5: Solve for x
    x = 436,606,436.67/20,478.31
  6. Step 6: Final answer
    x = 21,320.43

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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.