Home / 20,937.60-31,406.40-7,086.60

Finding the Fourth Proportional to 20,937.60, 31,406.40 and 7,086.60

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Solution

The fourth proportional to 20,937.60, 31,406.40 and 7,086.60 is: 10,629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.60 : 31,406.40 = 7,086.60 : x
  2. Step 2: Convert to fraction form
    20,937.60/31,406.40 = 7,086.60/x
  3. Step 3: Cross multiply
    20,937.60x = 31,406.40 × 7,086.60
  4. Step 4: Simplify right side
    20,937.60x = 222,564,594.24
  5. Step 5: Solve for x
    x = 222,564,594.24/20,937.60
  6. Step 6: Final answer
    x = 10,629.90

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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.