Home / 20,543.20-28,349.68-11,111.84

Finding the Fourth Proportional to 20,543.20, 28,349.68 and 11,111.84

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Solution

The fourth proportional to 20,543.20, 28,349.68 and 11,111.84 is: 15,334.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.20 : 28,349.68 = 11,111.84 : x
  2. Step 2: Convert to fraction form
    20,543.20/28,349.68 = 11,111.84/x
  3. Step 3: Cross multiply
    20,543.20x = 28,349.68 × 11,111.84
  4. Step 4: Simplify right side
    20,543.20x = 315,017,108.21
  5. Step 5: Solve for x
    x = 315,017,108.21/20,543.20
  6. Step 6: Final answer
    x = 15,334.37

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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.