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Finding the Fourth Proportional to 18,775.85, 25,913.52 and 10,709.47

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Solution

The fourth proportional to 18,775.85, 25,913.52 and 10,709.47 is: 14,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.85 : 25,913.52 = 10,709.47 : x
  2. Step 2: Convert to fraction form
    18,775.85/25,913.52 = 10,709.47/x
  3. Step 3: Cross multiply
    18,775.85x = 25,913.52 × 10,709.47
  4. Step 4: Simplify right side
    18,775.85x = 277,519,951.66
  5. Step 5: Solve for x
    x = 277,519,951.66/18,775.85
  6. Step 6: Final answer
    x = 14,780.69

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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.