Home / 9,210.90-12,709.72-5,231.48

Finding the Fourth Proportional to 9,210.90, 12,709.72 and 5,231.48

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Solution

The fourth proportional to 9,210.90, 12,709.72 and 5,231.48 is: 7,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210.90 : 12,709.72 = 5,231.48 : x
  2. Step 2: Convert to fraction form
    9,210.90/12,709.72 = 5,231.48/x
  3. Step 3: Cross multiply
    9,210.90x = 12,709.72 × 5,231.48
  4. Step 4: Simplify right side
    9,210.90x = 66,490,645.99
  5. Step 5: Solve for x
    x = 66,490,645.99/9,210.90
  6. Step 6: Final answer
    x = 7,218.69

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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.