Home / 21,284.81-31,934.50-8,140.94

Finding the Fourth Proportional to 21,284.81, 31,934.50 and 8,140.94

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Solution

The fourth proportional to 21,284.81, 31,934.50 and 8,140.94 is: 12,214.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.81 : 31,934.50 = 8,140.94 : x
  2. Step 2: Convert to fraction form
    21,284.81/31,934.50 = 8,140.94/x
  3. Step 3: Cross multiply
    21,284.81x = 31,934.50 × 8,140.94
  4. Step 4: Simplify right side
    21,284.81x = 259,976,648.05
  5. Step 5: Solve for x
    x = 259,976,648.05/21,284.81
  6. Step 6: Final answer
    x = 12,214.19

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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.