Home / 20,569.85-28,389.42-12,076.65

Finding the Fourth Proportional to 20,569.85, 28,389.42 and 12,076.65

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Solution

The fourth proportional to 20,569.85, 28,389.42 and 12,076.65 is: 16,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.85 : 28,389.42 = 12,076.65 : x
  2. Step 2: Convert to fraction form
    20,569.85/28,389.42 = 12,076.65/x
  3. Step 3: Cross multiply
    20,569.85x = 28,389.42 × 12,076.65
  4. Step 4: Simplify right side
    20,569.85x = 342,849,089.04
  5. Step 5: Solve for x
    x = 342,849,089.04/20,569.85
  6. Step 6: Final answer
    x = 16,667.55

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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.