Home / 20,281.51-30,422.43-5,490.55

Finding the Fourth Proportional to 20,281.51, 30,422.43 and 5,490.55

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Solution

The fourth proportional to 20,281.51, 30,422.43 and 5,490.55 is: 8,235.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.51 : 30,422.43 = 5,490.55 : x
  2. Step 2: Convert to fraction form
    20,281.51/30,422.43 = 5,490.55/x
  3. Step 3: Cross multiply
    20,281.51x = 30,422.43 × 5,490.55
  4. Step 4: Simplify right side
    20,281.51x = 167,035,873.04
  5. Step 5: Solve for x
    x = 167,035,873.04/20,281.51
  6. Step 6: Final answer
    x = 8,235.87

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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.