Home / 20,426.05-28,180.56-13,356.55

Finding the Fourth Proportional to 20,426.05, 28,180.56 and 13,356.55

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Solution

The fourth proportional to 20,426.05, 28,180.56 and 13,356.55 is: 18,427.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.05 : 28,180.56 = 13,356.55 : x
  2. Step 2: Convert to fraction form
    20,426.05/28,180.56 = 13,356.55/x
  3. Step 3: Cross multiply
    20,426.05x = 28,180.56 × 13,356.55
  4. Step 4: Simplify right side
    20,426.05x = 376,395,058.67
  5. Step 5: Solve for x
    x = 376,395,058.67/20,426.05
  6. Step 6: Final answer
    x = 18,427.21

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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.