Home / 20,705.28-28,574.44-12,212.39

Finding the Fourth Proportional to 20,705.28, 28,574.44 and 12,212.39

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Solution

The fourth proportional to 20,705.28, 28,574.44 and 12,212.39 is: 16,853.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.28 : 28,574.44 = 12,212.39 : x
  2. Step 2: Convert to fraction form
    20,705.28/28,574.44 = 12,212.39/x
  3. Step 3: Cross multiply
    20,705.28x = 28,574.44 × 12,212.39
  4. Step 4: Simplify right side
    20,705.28x = 348,962,001.38
  5. Step 5: Solve for x
    x = 348,962,001.38/20,705.28
  6. Step 6: Final answer
    x = 16,853.77

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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.