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Finding the Fourth Proportional to 8,720.31, 12,033.59 and 4,741.28

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Solution

The fourth proportional to 8,720.31, 12,033.59 and 4,741.28 is: 6,542.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.31 : 12,033.59 = 4,741.28 : x
  2. Step 2: Convert to fraction form
    8,720.31/12,033.59 = 4,741.28/x
  3. Step 3: Cross multiply
    8,720.31x = 12,033.59 × 4,741.28
  4. Step 4: Simplify right side
    8,720.31x = 57,054,535.72
  5. Step 5: Solve for x
    x = 57,054,535.72/8,720.31
  6. Step 6: Final answer
    x = 6,542.72

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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.