Home / 20,948.42-28,900.60-11,991.11

Finding the Fourth Proportional to 20,948.42, 28,900.60 and 11,991.11

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Solution

The fourth proportional to 20,948.42, 28,900.60 and 11,991.11 is: 16,543.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.42 : 28,900.60 = 11,991.11 : x
  2. Step 2: Convert to fraction form
    20,948.42/28,900.60 = 11,991.11/x
  3. Step 3: Cross multiply
    20,948.42x = 28,900.60 × 11,991.11
  4. Step 4: Simplify right side
    20,948.42x = 346,550,099.19
  5. Step 5: Solve for x
    x = 346,550,099.19/20,948.42
  6. Step 6: Final answer
    x = 16,543.02

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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.