Home / 21,284.48-31,925.28-8,138.18

Finding the Fourth Proportional to 21,284.48, 31,925.28 and 8,138.18

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Solution

The fourth proportional to 21,284.48, 31,925.28 and 8,138.18 is: 12,206.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.48 : 31,925.28 = 8,138.18 : x
  2. Step 2: Convert to fraction form
    21,284.48/31,925.28 = 8,138.18/x
  3. Step 3: Cross multiply
    21,284.48x = 31,925.28 × 8,138.18
  4. Step 4: Simplify right side
    21,284.48x = 259,813,675.19
  5. Step 5: Solve for x
    x = 259,813,675.19/21,284.48
  6. Step 6: Final answer
    x = 12,206.72

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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.