Home / 20,825.25-31,237.85-5,242.88

Finding the Fourth Proportional to 20,825.25, 31,237.85 and 5,242.88

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Solution

The fourth proportional to 20,825.25, 31,237.85 and 5,242.88 is: 7,864.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.25 : 31,237.85 = 5,242.88 : x
  2. Step 2: Convert to fraction form
    20,825.25/31,237.85 = 5,242.88/x
  3. Step 3: Cross multiply
    20,825.25x = 31,237.85 × 5,242.88
  4. Step 4: Simplify right side
    20,825.25x = 163,776,214.50
  5. Step 5: Solve for x
    x = 163,776,214.50/20,825.25
  6. Step 6: Final answer
    x = 7,864.31

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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.