Home / 28,375.31-39,159.15-15,800.06

Finding the Fourth Proportional to 28,375.31, 39,159.15 and 15,800.06

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Solution

The fourth proportional to 28,375.31, 39,159.15 and 15,800.06 is: 21,804.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.31 : 39,159.15 = 15,800.06 : x
  2. Step 2: Convert to fraction form
    28,375.31/39,159.15 = 15,800.06/x
  3. Step 3: Cross multiply
    28,375.31x = 39,159.15 × 15,800.06
  4. Step 4: Simplify right side
    28,375.31x = 618,716,958.20
  5. Step 5: Solve for x
    x = 618,716,958.20/28,375.31
  6. Step 6: Final answer
    x = 21,804.76

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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.