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Finding the Fourth Proportional to 25,640.70, 38,464.65 and 8,108.70

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Solution

The fourth proportional to 25,640.70, 38,464.65 and 8,108.70 is: 12,164.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,640.70 : 38,464.65 = 8,108.70 : x
  2. Step 2: Convert to fraction form
    25,640.70/38,464.65 = 8,108.70/x
  3. Step 3: Cross multiply
    25,640.70x = 38,464.65 × 8,108.70
  4. Step 4: Simplify right side
    25,640.70x = 311,898,307.46
  5. Step 5: Solve for x
    x = 311,898,307.46/25,640.70
  6. Step 6: Final answer
    x = 12,164.19

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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.