Home / 20,993.56-31,490.28-5,411.08

Finding the Fourth Proportional to 20,993.56, 31,490.28 and 5,411.08

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Solution

The fourth proportional to 20,993.56, 31,490.28 and 5,411.08 is: 8,116.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.56 : 31,490.28 = 5,411.08 : x
  2. Step 2: Convert to fraction form
    20,993.56/31,490.28 = 5,411.08/x
  3. Step 3: Cross multiply
    20,993.56x = 31,490.28 × 5,411.08
  4. Step 4: Simplify right side
    20,993.56x = 170,396,424.30
  5. Step 5: Solve for x
    x = 170,396,424.30/20,993.56
  6. Step 6: Final answer
    x = 8,116.60

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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.