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Finding the Fourth Proportional to 7,140.79, 10,713.30 and 2,210.79

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Solution

The fourth proportional to 7,140.79, 10,713.30 and 2,210.79 is: 3,316.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.79 : 10,713.30 = 2,210.79 : x
  2. Step 2: Convert to fraction form
    7,140.79/10,713.30 = 2,210.79/x
  3. Step 3: Cross multiply
    7,140.79x = 10,713.30 × 2,210.79
  4. Step 4: Simplify right side
    7,140.79x = 23,684,856.51
  5. Step 5: Solve for x
    x = 23,684,856.51/7,140.79
  6. Step 6: Final answer
    x = 3,316.84

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Why These Related Problems?

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