Home / 20,391.08-28,137.66-12,435.26

Finding the Fourth Proportional to 20,391.08, 28,137.66 and 12,435.26

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Solution

The fourth proportional to 20,391.08, 28,137.66 and 12,435.26 is: 17,159.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.08 : 28,137.66 = 12,435.26 : x
  2. Step 2: Convert to fraction form
    20,391.08/28,137.66 = 12,435.26/x
  3. Step 3: Cross multiply
    20,391.08x = 28,137.66 × 12,435.26
  4. Step 4: Simplify right side
    20,391.08x = 349,899,117.89
  5. Step 5: Solve for x
    x = 349,899,117.89/20,391.08
  6. Step 6: Final answer
    x = 17,159.42

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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.