Home / 20,543.28-28,349.70-11,111.84

Finding the Fourth Proportional to 20,543.28, 28,349.70 and 11,111.84

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Solution

The fourth proportional to 20,543.28, 28,349.70 and 11,111.84 is: 15,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.28 : 28,349.70 = 11,111.84 : x
  2. Step 2: Convert to fraction form
    20,543.28/28,349.70 = 11,111.84/x
  3. Step 3: Cross multiply
    20,543.28x = 28,349.70 × 11,111.84
  4. Step 4: Simplify right side
    20,543.28x = 315,017,330.45
  5. Step 5: Solve for x
    x = 315,017,330.45/20,543.28
  6. Step 6: Final answer
    x = 15,334.32

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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.