Home / 10,421.01-15,620.04-5,148.21

Finding the Fourth Proportional to 10,421.01, 15,620.04 and 5,148.21

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Solution

The fourth proportional to 10,421.01, 15,620.04 and 5,148.21 is: 7,716.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.01 : 15,620.04 = 5,148.21 : x
  2. Step 2: Convert to fraction form
    10,421.01/15,620.04 = 5,148.21/x
  3. Step 3: Cross multiply
    10,421.01x = 15,620.04 × 5,148.21
  4. Step 4: Simplify right side
    10,421.01x = 80,415,246.13
  5. Step 5: Solve for x
    x = 80,415,246.13/10,421.01
  6. Step 6: Final answer
    x = 7,716.65

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1.5x scale

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.