Home / 8,688.47-13,032.63-3,139.72

Finding the Fourth Proportional to 8,688.47, 13,032.63 and 3,139.72

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Solution

The fourth proportional to 8,688.47, 13,032.63 and 3,139.72 is: 4,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.47 : 13,032.63 = 3,139.72 : x
  2. Step 2: Convert to fraction form
    8,688.47/13,032.63 = 3,139.72/x
  3. Step 3: Cross multiply
    8,688.47x = 13,032.63 × 3,139.72
  4. Step 4: Simplify right side
    8,688.47x = 40,918,743.90
  5. Step 5: Solve for x
    x = 40,918,743.90/8,688.47
  6. Step 6: Final answer
    x = 4,709.55

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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.