Home / 20,838.90-31,265.55-9,150.42

Finding the Fourth Proportional to 20,838.90, 31,265.55 and 9,150.42

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Solution

The fourth proportional to 20,838.90, 31,265.55 and 9,150.42 is: 13,728.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.90 : 31,265.55 = 9,150.42 : x
  2. Step 2: Convert to fraction form
    20,838.90/31,265.55 = 9,150.42/x
  3. Step 3: Cross multiply
    20,838.90x = 31,265.55 × 9,150.42
  4. Step 4: Simplify right side
    20,838.90x = 286,092,914.03
  5. Step 5: Solve for x
    x = 286,092,914.03/20,838.90
  6. Step 6: Final answer
    x = 13,728.79

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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.