Home / 20,543.16-28,349.64-11,111.80

Finding the Fourth Proportional to 20,543.16, 28,349.64 and 11,111.80

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Solution

The fourth proportional to 20,543.16, 28,349.64 and 11,111.80 is: 15,334.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.16 : 28,349.64 = 11,111.80 : x
  2. Step 2: Convert to fraction form
    20,543.16/28,349.64 = 11,111.80/x
  3. Step 3: Cross multiply
    20,543.16x = 28,349.64 × 11,111.80
  4. Step 4: Simplify right side
    20,543.16x = 315,015,529.75
  5. Step 5: Solve for x
    x = 315,015,529.75/20,543.16
  6. Step 6: Final answer
    x = 15,334.33

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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.