Home / 13,345.11-20,020.53-3,985.86

Finding the Fourth Proportional to 13,345.11, 20,020.53 and 3,985.86

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Solution

The fourth proportional to 13,345.11, 20,020.53 and 3,985.86 is: 5,979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.11 : 20,020.53 = 3,985.86 : x
  2. Step 2: Convert to fraction form
    13,345.11/20,020.53 = 3,985.86/x
  3. Step 3: Cross multiply
    13,345.11x = 20,020.53 × 3,985.86
  4. Step 4: Simplify right side
    13,345.11x = 79,799,029.71
  5. Step 5: Solve for x
    x = 79,799,029.71/13,345.11
  6. Step 6: Final answer
    x = 5,979.65

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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.