Home / 8,972.19-13,458.34-3,128.81

Finding the Fourth Proportional to 8,972.19, 13,458.34 and 3,128.81

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Solution

The fourth proportional to 8,972.19, 13,458.34 and 3,128.81 is: 4,693.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.19 : 13,458.34 = 3,128.81 : x
  2. Step 2: Convert to fraction form
    8,972.19/13,458.34 = 3,128.81/x
  3. Step 3: Cross multiply
    8,972.19x = 13,458.34 × 3,128.81
  4. Step 4: Simplify right side
    8,972.19x = 42,108,525.39
  5. Step 5: Solve for x
    x = 42,108,525.39/8,972.19
  6. Step 6: Final answer
    x = 4,693.23

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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.