Home / 28,376.49-39,159.18-15,629.40

Finding the Fourth Proportional to 28,376.49, 39,159.18 and 15,629.40

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Solution

The fourth proportional to 28,376.49, 39,159.18 and 15,629.40 is: 21,568.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.49 : 39,159.18 = 15,629.40 : x
  2. Step 2: Convert to fraction form
    28,376.49/39,159.18 = 15,629.40/x
  3. Step 3: Cross multiply
    28,376.49x = 39,159.18 × 15,629.40
  4. Step 4: Simplify right side
    28,376.49x = 612,034,487.89
  5. Step 5: Solve for x
    x = 612,034,487.89/28,376.49
  6. Step 6: Final answer
    x = 21,568.36

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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.