Home / 10,421.76-15,621.16-5,148.96

Finding the Fourth Proportional to 10,421.76, 15,621.16 and 5,148.96

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Solution

The fourth proportional to 10,421.76, 15,621.16 and 5,148.96 is: 7,717.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.76 : 15,621.16 = 5,148.96 : x
  2. Step 2: Convert to fraction form
    10,421.76/15,621.16 = 5,148.96/x
  3. Step 3: Cross multiply
    10,421.76x = 15,621.16 × 5,148.96
  4. Step 4: Simplify right side
    10,421.76x = 80,432,727.99
  5. Step 5: Solve for x
    x = 80,432,727.99/10,421.76
  6. Step 6: Final answer
    x = 7,717.77

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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.