Home / 31,639.96-43,666.35-18,211.78

Finding the Fourth Proportional to 31,639.96, 43,666.35 and 18,211.78

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Solution

The fourth proportional to 31,639.96, 43,666.35 and 18,211.78 is: 25,134.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,639.96 : 43,666.35 = 18,211.78 : x
  2. Step 2: Convert to fraction form
    31,639.96/43,666.35 = 18,211.78/x
  3. Step 3: Cross multiply
    31,639.96x = 43,666.35 × 18,211.78
  4. Step 4: Simplify right side
    31,639.96x = 795,241,959.60
  5. Step 5: Solve for x
    x = 795,241,959.60/31,639.96
  6. Step 6: Final answer
    x = 25,134.10

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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.