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Finding the Fourth Proportional to 7,182.69, 10,774.79 and 1,988.57

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Solution

The fourth proportional to 7,182.69, 10,774.79 and 1,988.57 is: 2,983.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,182.69 : 10,774.79 = 1,988.57 : x
  2. Step 2: Convert to fraction form
    7,182.69/10,774.79 = 1,988.57/x
  3. Step 3: Cross multiply
    7,182.69x = 10,774.79 × 1,988.57
  4. Step 4: Simplify right side
    7,182.69x = 21,426,360.33
  5. Step 5: Solve for x
    x = 21,426,360.33/7,182.69
  6. Step 6: Final answer
    x = 2,983.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.