Home / 28,215.60-38,919.84-18,157.12

Finding the Fourth Proportional to 28,215.60, 38,919.84 and 18,157.12

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Solution

The fourth proportional to 28,215.60, 38,919.84 and 18,157.12 is: 25,045.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.60 : 38,919.84 = 18,157.12 : x
  2. Step 2: Convert to fraction form
    28,215.60/38,919.84 = 18,157.12/x
  3. Step 3: Cross multiply
    28,215.60x = 38,919.84 × 18,157.12
  4. Step 4: Simplify right side
    28,215.60x = 706,672,205.26
  5. Step 5: Solve for x
    x = 706,672,205.26/28,215.60
  6. Step 6: Final answer
    x = 25,045.44

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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.