Home / 21,086.60-31,604.30-9,387.40

Finding the Fourth Proportional to 21,086.60, 31,604.30 and 9,387.40

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Solution

The fourth proportional to 21,086.60, 31,604.30 and 9,387.40 is: 14,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.60 : 31,604.30 = 9,387.40 : x
  2. Step 2: Convert to fraction form
    21,086.60/31,604.30 = 9,387.40/x
  3. Step 3: Cross multiply
    21,086.60x = 31,604.30 × 9,387.40
  4. Step 4: Simplify right side
    21,086.60x = 296,682,205.82
  5. Step 5: Solve for x
    x = 296,682,205.82/21,086.60
  6. Step 6: Final answer
    x = 14,069.70

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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.