Home / 28,172.34-38,876.63-15,425.29

Finding the Fourth Proportional to 28,172.34, 38,876.63 and 15,425.29

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Solution

The fourth proportional to 28,172.34, 38,876.63 and 15,425.29 is: 21,286.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.34 : 38,876.63 = 15,425.29 : x
  2. Step 2: Convert to fraction form
    28,172.34/38,876.63 = 15,425.29/x
  3. Step 3: Cross multiply
    28,172.34x = 38,876.63 × 15,425.29
  4. Step 4: Simplify right side
    28,172.34x = 599,683,291.97
  5. Step 5: Solve for x
    x = 599,683,291.97/28,172.34
  6. Step 6: Final answer
    x = 21,286.24

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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.