Home / 20,886.66-28,811.70-14,921.28

Finding the Fourth Proportional to 20,886.66, 28,811.70 and 14,921.28

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Solution

The fourth proportional to 20,886.66, 28,811.70 and 14,921.28 is: 20,582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.66 : 28,811.70 = 14,921.28 : x
  2. Step 2: Convert to fraction form
    20,886.66/28,811.70 = 14,921.28/x
  3. Step 3: Cross multiply
    20,886.66x = 28,811.70 × 14,921.28
  4. Step 4: Simplify right side
    20,886.66x = 429,907,442.98
  5. Step 5: Solve for x
    x = 429,907,442.98/20,886.66
  6. Step 6: Final answer
    x = 20,582.87

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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.