Home / 9,988.29-13,780.62-6,631.74

Finding the Fourth Proportional to 9,988.29, 13,780.62 and 6,631.74

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Solution

The fourth proportional to 9,988.29, 13,780.62 and 6,631.74 is: 9,149.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.29 : 13,780.62 = 6,631.74 : x
  2. Step 2: Convert to fraction form
    9,988.29/13,780.62 = 6,631.74/x
  3. Step 3: Cross multiply
    9,988.29x = 13,780.62 × 6,631.74
  4. Step 4: Simplify right side
    9,988.29x = 91,389,488.88
  5. Step 5: Solve for x
    x = 91,389,488.88/9,988.29
  6. Step 6: Final answer
    x = 9,149.66

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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.