Home / 10,421.26-15,620.42-5,148.46

Finding the Fourth Proportional to 10,421.26, 15,620.42 and 5,148.46

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Solution

The fourth proportional to 10,421.26, 15,620.42 and 5,148.46 is: 7,717.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.26 : 15,620.42 = 5,148.46 : x
  2. Step 2: Convert to fraction form
    10,421.26/15,620.42 = 5,148.46/x
  3. Step 3: Cross multiply
    10,421.26x = 15,620.42 × 5,148.46
  4. Step 4: Simplify right side
    10,421.26x = 80,421,081.81
  5. Step 5: Solve for x
    x = 80,421,081.81/10,421.26
  6. Step 6: Final answer
    x = 7,717.02

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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.