Home / 21,202.05-31,810.87-8,718.74

Finding the Fourth Proportional to 21,202.05, 31,810.87 and 8,718.74

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Solution

The fourth proportional to 21,202.05, 31,810.87 and 8,718.74 is: 13,081.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.05 : 31,810.87 = 8,718.74 : x
  2. Step 2: Convert to fraction form
    21,202.05/31,810.87 = 8,718.74/x
  3. Step 3: Cross multiply
    21,202.05x = 31,810.87 × 8,718.74
  4. Step 4: Simplify right side
    21,202.05x = 277,350,545.65
  5. Step 5: Solve for x
    x = 277,350,545.65/21,202.05
  6. Step 6: Final answer
    x = 13,081.31

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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.