Home / 13,686.71-20,538.18-5,788.81

Finding the Fourth Proportional to 13,686.71, 20,538.18 and 5,788.81

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Solution

The fourth proportional to 13,686.71, 20,538.18 and 5,788.81 is: 8,686.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.71 : 20,538.18 = 5,788.81 : x
  2. Step 2: Convert to fraction form
    13,686.71/20,538.18 = 5,788.81/x
  3. Step 3: Cross multiply
    13,686.71x = 20,538.18 × 5,788.81
  4. Step 4: Simplify right side
    13,686.71x = 118,891,621.77
  5. Step 5: Solve for x
    x = 118,891,621.77/13,686.71
  6. Step 6: Final answer
    x = 8,686.65

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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.