Home / 20,735.80-31,079.40-15,535.60

Finding the Fourth Proportional to 20,735.80, 31,079.40 and 15,535.60

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Solution

The fourth proportional to 20,735.80, 31,079.40 and 15,535.60 is: 23,285.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735.80 : 31,079.40 = 15,535.60 : x
  2. Step 2: Convert to fraction form
    20,735.80/31,079.40 = 15,535.60/x
  3. Step 3: Cross multiply
    20,735.80x = 31,079.40 × 15,535.60
  4. Step 4: Simplify right side
    20,735.80x = 482,837,126.64
  5. Step 5: Solve for x
    x = 482,837,126.64/20,735.80
  6. Step 6: Final answer
    x = 23,285.19

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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.