Home / 31,659.85-43,690.35-18,918.55

Finding the Fourth Proportional to 31,659.85, 43,690.35 and 18,918.55

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Solution

The fourth proportional to 31,659.85, 43,690.35 and 18,918.55 is: 26,107.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,659.85 : 43,690.35 = 18,918.55 : x
  2. Step 2: Convert to fraction form
    31,659.85/43,690.35 = 18,918.55/x
  3. Step 3: Cross multiply
    31,659.85x = 43,690.35 × 18,918.55
  4. Step 4: Simplify right side
    31,659.85x = 826,558,070.99
  5. Step 5: Solve for x
    x = 826,558,070.99/31,659.85
  6. Step 6: Final answer
    x = 26,107.45

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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.