Home / 21,260.12-31,891.80-6,470.30

Finding the Fourth Proportional to 21,260.12, 31,891.80 and 6,470.30

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Solution

The fourth proportional to 21,260.12, 31,891.80 and 6,470.30 is: 9,705.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.12 : 31,891.80 = 6,470.30 : x
  2. Step 2: Convert to fraction form
    21,260.12/31,891.80 = 6,470.30/x
  3. Step 3: Cross multiply
    21,260.12x = 31,891.80 × 6,470.30
  4. Step 4: Simplify right side
    21,260.12x = 206,349,513.54
  5. Step 5: Solve for x
    x = 206,349,513.54/21,260.12
  6. Step 6: Final answer
    x = 9,705.94

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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.