Home / 9,780.75-13,508.37-6,631.47

Finding the Fourth Proportional to 9,780.75, 13,508.37 and 6,631.47

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Solution

The fourth proportional to 9,780.75, 13,508.37 and 6,631.47 is: 9,158.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780.75 : 13,508.37 = 6,631.47 : x
  2. Step 2: Convert to fraction form
    9,780.75/13,508.37 = 6,631.47/x
  3. Step 3: Cross multiply
    9,780.75x = 13,508.37 × 6,631.47
  4. Step 4: Simplify right side
    9,780.75x = 89,580,350.40
  5. Step 5: Solve for x
    x = 89,580,350.40/9,780.75
  6. Step 6: Final answer
    x = 9,158.84

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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.