Home / 47,639.28-65,755.80-28,777.68

Finding the Fourth Proportional to 47,639.28, 65,755.80 and 28,777.68

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Solution

The fourth proportional to 47,639.28, 65,755.80 and 28,777.68 is: 39,721.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,639.28 : 65,755.80 = 28,777.68 : x
  2. Step 2: Convert to fraction form
    47,639.28/65,755.80 = 28,777.68/x
  3. Step 3: Cross multiply
    47,639.28x = 65,755.80 × 28,777.68
  4. Step 4: Simplify right side
    47,639.28x = 1,892,299,370.54
  5. Step 5: Solve for x
    x = 1,892,299,370.54/47,639.28
  6. Step 6: Final answer
    x = 39,721.41

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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.