Home / 20,990.09-28,944.55-16,210.81

Finding the Fourth Proportional to 20,990.09, 28,944.55 and 16,210.81

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Solution

The fourth proportional to 20,990.09, 28,944.55 and 16,210.81 is: 22,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.09 : 28,944.55 = 16,210.81 : x
  2. Step 2: Convert to fraction form
    20,990.09/28,944.55 = 16,210.81/x
  3. Step 3: Cross multiply
    20,990.09x = 28,944.55 × 16,210.81
  4. Step 4: Simplify right side
    20,990.09x = 469,214,530.03
  5. Step 5: Solve for x
    x = 469,214,530.03/20,990.09
  6. Step 6: Final answer
    x = 22,354.10

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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.