Home / 20,345.48-28,079.43-11,847.75

Finding the Fourth Proportional to 20,345.48, 28,079.43 and 11,847.75

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Solution

The fourth proportional to 20,345.48, 28,079.43 and 11,847.75 is: 16,351.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.48 : 28,079.43 = 11,847.75 : x
  2. Step 2: Convert to fraction form
    20,345.48/28,079.43 = 11,847.75/x
  3. Step 3: Cross multiply
    20,345.48x = 28,079.43 × 11,847.75
  4. Step 4: Simplify right side
    20,345.48x = 332,678,066.78
  5. Step 5: Solve for x
    x = 332,678,066.78/20,345.48
  6. Step 6: Final answer
    x = 16,351.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.