Home / 15,877.21-21,912.35-9,164.64

Finding the Fourth Proportional to 15,877.21, 21,912.35 and 9,164.64

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Solution

The fourth proportional to 15,877.21, 21,912.35 and 9,164.64 is: 12,648.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,877.21 : 21,912.35 = 9,164.64 : x
  2. Step 2: Convert to fraction form
    15,877.21/21,912.35 = 9,164.64/x
  3. Step 3: Cross multiply
    15,877.21x = 21,912.35 × 9,164.64
  4. Step 4: Simplify right side
    15,877.21x = 200,818,722.86
  5. Step 5: Solve for x
    x = 200,818,722.86/15,877.21
  6. Step 6: Final answer
    x = 12,648.24

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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.