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Finding the Fourth Proportional to 25,953.57, 38,931.75 and 8,422.11

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Solution

The fourth proportional to 25,953.57, 38,931.75 and 8,422.11 is: 12,633.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,953.57 : 38,931.75 = 8,422.11 : x
  2. Step 2: Convert to fraction form
    25,953.57/38,931.75 = 8,422.11/x
  3. Step 3: Cross multiply
    25,953.57x = 38,931.75 × 8,422.11
  4. Step 4: Simplify right side
    25,953.57x = 327,887,480.99
  5. Step 5: Solve for x
    x = 327,887,480.99/25,953.57
  6. Step 6: Final answer
    x = 12,633.62

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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.