Home / 10,147.87-15,223.23-3,128.45

Finding the Fourth Proportional to 10,147.87, 15,223.23 and 3,128.45

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Solution

The fourth proportional to 10,147.87, 15,223.23 and 3,128.45 is: 4,693.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,147.87 : 15,223.23 = 3,128.45 : x
  2. Step 2: Convert to fraction form
    10,147.87/15,223.23 = 3,128.45/x
  3. Step 3: Cross multiply
    10,147.87x = 15,223.23 × 3,128.45
  4. Step 4: Simplify right side
    10,147.87x = 47,625,113.89
  5. Step 5: Solve for x
    x = 47,625,113.89/10,147.87
  6. Step 6: Final answer
    x = 4,693.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.