Home / 28,135.08-38,824.84-15,385.72

Finding the Fourth Proportional to 28,135.08, 38,824.84 and 15,385.72

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Solution

The fourth proportional to 28,135.08, 38,824.84 and 15,385.72 is: 21,231.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.08 : 38,824.84 = 15,385.72 : x
  2. Step 2: Convert to fraction form
    28,135.08/38,824.84 = 15,385.72/x
  3. Step 3: Cross multiply
    28,135.08x = 38,824.84 × 15,385.72
  4. Step 4: Simplify right side
    28,135.08x = 597,348,117.28
  5. Step 5: Solve for x
    x = 597,348,117.28/28,135.08
  6. Step 6: Final answer
    x = 21,231.43

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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.