Home / 8,319.16-11,479.66-5,172.92

Finding the Fourth Proportional to 8,319.16, 11,479.66 and 5,172.92

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Solution

The fourth proportional to 8,319.16, 11,479.66 and 5,172.92 is: 7,138.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.16 : 11,479.66 = 5,172.92 : x
  2. Step 2: Convert to fraction form
    8,319.16/11,479.66 = 5,172.92/x
  3. Step 3: Cross multiply
    8,319.16x = 11,479.66 × 5,172.92
  4. Step 4: Simplify right side
    8,319.16x = 59,383,362.81
  5. Step 5: Solve for x
    x = 59,383,362.81/8,319.16
  6. Step 6: Final answer
    x = 7,138.14

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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.