Home / 9,189.20-12,680.63-5,210.21

Finding the Fourth Proportional to 9,189.20, 12,680.63 and 5,210.21

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Solution

The fourth proportional to 9,189.20, 12,680.63 and 5,210.21 is: 7,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.20 : 12,680.63 = 5,210.21 : x
  2. Step 2: Convert to fraction form
    9,189.20/12,680.63 = 5,210.21/x
  3. Step 3: Cross multiply
    9,189.20x = 12,680.63 × 5,210.21
  4. Step 4: Simplify right side
    9,189.20x = 66,068,655.78
  5. Step 5: Solve for x
    x = 66,068,655.78/9,189.20
  6. Step 6: Final answer
    x = 7,189.82

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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.