Home / 9,363.12-12,920.80-5,171.28

Finding the Fourth Proportional to 9,363.12, 12,920.80 and 5,171.28

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Solution

The fourth proportional to 9,363.12, 12,920.80 and 5,171.28 is: 7,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,363.12 : 12,920.80 = 5,171.28 : x
  2. Step 2: Convert to fraction form
    9,363.12/12,920.80 = 5,171.28/x
  3. Step 3: Cross multiply
    9,363.12x = 12,920.80 × 5,171.28
  4. Step 4: Simplify right side
    9,363.12x = 66,817,074.62
  5. Step 5: Solve for x
    x = 66,817,074.62/9,363.12
  6. Step 6: Final answer
    x = 7,136.20

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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.