Home / 20,959.90-31,424.76-6,912.07

Finding the Fourth Proportional to 20,959.90, 31,424.76 and 6,912.07

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Solution

The fourth proportional to 20,959.90, 31,424.76 and 6,912.07 is: 10,363.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.90 : 31,424.76 = 6,912.07 : x
  2. Step 2: Convert to fraction form
    20,959.90/31,424.76 = 6,912.07/x
  3. Step 3: Cross multiply
    20,959.90x = 31,424.76 × 6,912.07
  4. Step 4: Simplify right side
    20,959.90x = 217,210,062.29
  5. Step 5: Solve for x
    x = 217,210,062.29/20,959.90
  6. Step 6: Final answer
    x = 10,363.13

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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.