Home / 21,186.66-31,772.52-6,391.74

Finding the Fourth Proportional to 21,186.66, 31,772.52 and 6,391.74

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Solution

The fourth proportional to 21,186.66, 31,772.52 and 6,391.74 is: 9,585.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.66 : 31,772.52 = 6,391.74 : x
  2. Step 2: Convert to fraction form
    21,186.66/31,772.52 = 6,391.74/x
  3. Step 3: Cross multiply
    21,186.66x = 31,772.52 × 6,391.74
  4. Step 4: Simplify right side
    21,186.66x = 203,081,686.98
  5. Step 5: Solve for x
    x = 203,081,686.98/21,186.66
  6. Step 6: Final answer
    x = 9,585.36

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1.5x scale

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.