Home / 10,389.40-15,574.48-4,147.88

Finding the Fourth Proportional to 10,389.40, 15,574.48 and 4,147.88

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Solution

The fourth proportional to 10,389.40, 15,574.48 and 4,147.88 is: 6,217.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389.40 : 15,574.48 = 4,147.88 : x
  2. Step 2: Convert to fraction form
    10,389.40/15,574.48 = 4,147.88/x
  3. Step 3: Cross multiply
    10,389.40x = 15,574.48 × 4,147.88
  4. Step 4: Simplify right side
    10,389.40x = 64,600,985.86
  5. Step 5: Solve for x
    x = 64,600,985.86/10,389.40
  6. Step 6: Final answer
    x = 6,217.97

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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.