Home / 7,020.32-10,531.68-2,638.40

Finding the Fourth Proportional to 7,020.32, 10,531.68 and 2,638.40

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Solution

The fourth proportional to 7,020.32, 10,531.68 and 2,638.40 is: 3,958.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.32 : 10,531.68 = 2,638.40 : x
  2. Step 2: Convert to fraction form
    7,020.32/10,531.68 = 2,638.40/x
  3. Step 3: Cross multiply
    7,020.32x = 10,531.68 × 2,638.40
  4. Step 4: Simplify right side
    7,020.32x = 27,786,784.51
  5. Step 5: Solve for x
    x = 27,786,784.51/7,020.32
  6. Step 6: Final answer
    x = 3,958.05

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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.