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Finding the Fourth Proportional to 28,408.68, 42,613 and 7,632.18

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Solution

The fourth proportional to 28,408.68, 42,613 and 7,632.18 is: 11,448.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.68 : 42,613 = 7,632.18 : x
  2. Step 2: Convert to fraction form
    28,408.68/42,613 = 7,632.18/x
  3. Step 3: Cross multiply
    28,408.68x = 42,613 × 7,632.18
  4. Step 4: Simplify right side
    28,408.68x = 325,230,086.34
  5. Step 5: Solve for x
    x = 325,230,086.34/28,408.68
  6. Step 6: Final answer
    x = 11,448.26

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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.