Home / 10,475.98-15,719.63-8,140.68

Finding the Fourth Proportional to 10,475.98, 15,719.63 and 8,140.68

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Solution

The fourth proportional to 10,475.98, 15,719.63 and 8,140.68 is: 12,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,475.98 : 15,719.63 = 8,140.68 : x
  2. Step 2: Convert to fraction form
    10,475.98/15,719.63 = 8,140.68/x
  3. Step 3: Cross multiply
    10,475.98x = 15,719.63 × 8,140.68
  4. Step 4: Simplify right side
    10,475.98x = 127,968,436.85
  5. Step 5: Solve for x
    x = 127,968,436.85/10,475.98
  6. Step 6: Final answer
    x = 12,215.42

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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.