Home / 8,688.47-11,989.80-5,103.36

Finding the Fourth Proportional to 8,688.47, 11,989.80 and 5,103.36

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Solution

The fourth proportional to 8,688.47, 11,989.80 and 5,103.36 is: 7,042.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.47 : 11,989.80 = 5,103.36 : x
  2. Step 2: Convert to fraction form
    8,688.47/11,989.80 = 5,103.36/x
  3. Step 3: Cross multiply
    8,688.47x = 11,989.80 × 5,103.36
  4. Step 4: Simplify right side
    8,688.47x = 61,188,265.73
  5. Step 5: Solve for x
    x = 61,188,265.73/8,688.47
  6. Step 6: Final answer
    x = 7,042.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.