Home / 9,878.39-13,631.22-5,629.13

Finding the Fourth Proportional to 9,878.39, 13,631.22 and 5,629.13

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Solution

The fourth proportional to 9,878.39, 13,631.22 and 5,629.13 is: 7,767.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,878.39 : 13,631.22 = 5,629.13 : x
  2. Step 2: Convert to fraction form
    9,878.39/13,631.22 = 5,629.13/x
  3. Step 3: Cross multiply
    9,878.39x = 13,631.22 × 5,629.13
  4. Step 4: Simplify right side
    9,878.39x = 76,731,892.40
  5. Step 5: Solve for x
    x = 76,731,892.40/9,878.39
  6. Step 6: Final answer
    x = 7,767.65

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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.