Home / 20,569.32-28,385.46-11,137.72

Finding the Fourth Proportional to 20,569.32, 28,385.46 and 11,137.72

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Solution

The fourth proportional to 20,569.32, 28,385.46 and 11,137.72 is: 15,369.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.32 : 28,385.46 = 11,137.72 : x
  2. Step 2: Convert to fraction form
    20,569.32/28,385.46 = 11,137.72/x
  3. Step 3: Cross multiply
    20,569.32x = 28,385.46 × 11,137.72
  4. Step 4: Simplify right side
    20,569.32x = 316,149,305.55
  5. Step 5: Solve for x
    x = 316,149,305.55/20,569.32
  6. Step 6: Final answer
    x = 15,369.94

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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.