Home / 15,928.21-21,981.68-8,854.75

Finding the Fourth Proportional to 15,928.21, 21,981.68 and 8,854.75

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Solution

The fourth proportional to 15,928.21, 21,981.68 and 8,854.75 is: 12,219.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.21 : 21,981.68 = 8,854.75 : x
  2. Step 2: Convert to fraction form
    15,928.21/21,981.68 = 8,854.75/x
  3. Step 3: Cross multiply
    15,928.21x = 21,981.68 × 8,854.75
  4. Step 4: Simplify right side
    15,928.21x = 194,642,280.98
  5. Step 5: Solve for x
    x = 194,642,280.98/15,928.21
  6. Step 6: Final answer
    x = 12,219.97

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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.