Home / 47,621.31-65,720.12-28,764.51

Finding the Fourth Proportional to 47,621.31, 65,720.12 and 28,764.51

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Solution

The fourth proportional to 47,621.31, 65,720.12 and 28,764.51 is: 39,696.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,621.31 : 65,720.12 = 28,764.51 : x
  2. Step 2: Convert to fraction form
    47,621.31/65,720.12 = 28,764.51/x
  3. Step 3: Cross multiply
    47,621.31x = 65,720.12 × 28,764.51
  4. Step 4: Simplify right side
    47,621.31x = 1,890,407,048.94
  5. Step 5: Solve for x
    x = 1,890,407,048.94/47,621.31
  6. Step 6: Final answer
    x = 39,696.66

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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.