Home / 7,117.28-10,678.20-3,220.64

Finding the Fourth Proportional to 7,117.28, 10,678.20 and 3,220.64

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Solution

The fourth proportional to 7,117.28, 10,678.20 and 3,220.64 is: 4,831.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.28 : 10,678.20 = 3,220.64 : x
  2. Step 2: Convert to fraction form
    7,117.28/10,678.20 = 3,220.64/x
  3. Step 3: Cross multiply
    7,117.28x = 10,678.20 × 3,220.64
  4. Step 4: Simplify right side
    7,117.28x = 34,390,638.05
  5. Step 5: Solve for x
    x = 34,390,638.05/7,117.28
  6. Step 6: Final answer
    x = 4,831.99

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