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Finding the Fourth Proportional to 47,785.86, 65,959.86 and 28,938.78

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Solution

The fourth proportional to 47,785.86, 65,959.86 and 28,938.78 is: 39,944.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,785.86 : 65,959.86 = 28,938.78 : x
  2. Step 2: Convert to fraction form
    47,785.86/65,959.86 = 28,938.78/x
  3. Step 3: Cross multiply
    47,785.86x = 65,959.86 × 28,938.78
  4. Step 4: Simplify right side
    47,785.86x = 1,908,797,877.37
  5. Step 5: Solve for x
    x = 1,908,797,877.37/47,785.86
  6. Step 6: Final answer
    x = 39,944.83

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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.