Home / 15,845.85-21,909.02-13,877.55

Finding the Fourth Proportional to 15,845.85, 21,909.02 and 13,877.55

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Solution

The fourth proportional to 15,845.85, 21,909.02 and 13,877.55 is: 19,187.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.85 : 21,909.02 = 13,877.55 : x
  2. Step 2: Convert to fraction form
    15,845.85/21,909.02 = 13,877.55/x
  3. Step 3: Cross multiply
    15,845.85x = 21,909.02 × 13,877.55
  4. Step 4: Simplify right side
    15,845.85x = 304,043,451.11
  5. Step 5: Solve for x
    x = 304,043,451.11/15,845.85
  6. Step 6: Final answer
    x = 19,187.58

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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.