Home / 20,840.90-31,268.56-9,152.42

Finding the Fourth Proportional to 20,840.90, 31,268.56 and 9,152.42

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Solution

The fourth proportional to 20,840.90, 31,268.56 and 9,152.42 is: 13,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.90 : 31,268.56 = 9,152.42 : x
  2. Step 2: Convert to fraction form
    20,840.90/31,268.56 = 9,152.42/x
  3. Step 3: Cross multiply
    20,840.90x = 31,268.56 × 9,152.42
  4. Step 4: Simplify right side
    20,840.90x = 286,182,993.92
  5. Step 5: Solve for x
    x = 286,182,993.92/20,840.90
  6. Step 6: Final answer
    x = 13,731.80

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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.