Home / 31,121.20-42,945.58-17,690.60

Finding the Fourth Proportional to 31,121.20, 42,945.58 and 17,690.60

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Solution

The fourth proportional to 31,121.20, 42,945.58 and 17,690.60 is: 24,412.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.20 : 42,945.58 = 17,690.60 : x
  2. Step 2: Convert to fraction form
    31,121.20/42,945.58 = 17,690.60/x
  3. Step 3: Cross multiply
    31,121.20x = 42,945.58 × 17,690.60
  4. Step 4: Simplify right side
    31,121.20x = 759,733,077.55
  5. Step 5: Solve for x
    x = 759,733,077.55/31,121.20
  6. Step 6: Final answer
    x = 24,412.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.