Home / 20,543.21-28,349.54-11,111.76

Finding the Fourth Proportional to 20,543.21, 28,349.54 and 11,111.76

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Solution

The fourth proportional to 20,543.21, 28,349.54 and 11,111.76 is: 15,334.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.21 : 28,349.54 = 11,111.76 : x
  2. Step 2: Convert to fraction form
    20,543.21/28,349.54 = 11,111.76/x
  3. Step 3: Cross multiply
    20,543.21x = 28,349.54 × 11,111.76
  4. Step 4: Simplify right side
    20,543.21x = 315,013,229.03
  5. Step 5: Solve for x
    x = 315,013,229.03/20,543.21
  6. Step 6: Final answer
    x = 15,334.18

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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.