Home / 20,135.85-27,801.37-12,585.57

Finding the Fourth Proportional to 20,135.85, 27,801.37 and 12,585.57

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Solution

The fourth proportional to 20,135.85, 27,801.37 and 12,585.57 is: 17,376.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.85 : 27,801.37 = 12,585.57 : x
  2. Step 2: Convert to fraction form
    20,135.85/27,801.37 = 12,585.57/x
  3. Step 3: Cross multiply
    20,135.85x = 27,801.37 × 12,585.57
  4. Step 4: Simplify right side
    20,135.85x = 349,896,088.23
  5. Step 5: Solve for x
    x = 349,896,088.23/20,135.85
  6. Step 6: Final answer
    x = 17,376.77

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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.