Home / 20,569.40-28,385.78-11,137.96

Finding the Fourth Proportional to 20,569.40, 28,385.78 and 11,137.96

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Solution

The fourth proportional to 20,569.40, 28,385.78 and 11,137.96 is: 15,370.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.40 : 28,385.78 = 11,137.96 : x
  2. Step 2: Convert to fraction form
    20,569.40/28,385.78 = 11,137.96/x
  3. Step 3: Cross multiply
    20,569.40x = 28,385.78 × 11,137.96
  4. Step 4: Simplify right side
    20,569.40x = 316,159,682.21
  5. Step 5: Solve for x
    x = 316,159,682.21/20,569.40
  6. Step 6: Final answer
    x = 15,370.39

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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.