Home / 28,137.08-38,827.60-15,387.72

Finding the Fourth Proportional to 28,137.08, 38,827.60 and 15,387.72

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Solution

The fourth proportional to 28,137.08, 38,827.60 and 15,387.72 is: 21,234.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.08 : 38,827.60 = 15,387.72 : x
  2. Step 2: Convert to fraction form
    28,137.08/38,827.60 = 15,387.72/x
  3. Step 3: Cross multiply
    28,137.08x = 38,827.60 × 15,387.72
  4. Step 4: Simplify right side
    28,137.08x = 597,468,237.07
  5. Step 5: Solve for x
    x = 597,468,237.07/28,137.08
  6. Step 6: Final answer
    x = 21,234.19

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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.