Home / 21,055.87-31,583.71-8,572.93

Finding the Fourth Proportional to 21,055.87, 31,583.71 and 8,572.93

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Solution

The fourth proportional to 21,055.87, 31,583.71 and 8,572.93 is: 12,859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.87 : 31,583.71 = 8,572.93 : x
  2. Step 2: Convert to fraction form
    21,055.87/31,583.71 = 8,572.93/x
  3. Step 3: Cross multiply
    21,055.87x = 31,583.71 × 8,572.93
  4. Step 4: Simplify right side
    21,055.87x = 270,764,934.97
  5. Step 5: Solve for x
    x = 270,764,934.97/21,055.87
  6. Step 6: Final answer
    x = 12,859.36

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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.