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Finding the Fourth Proportional to 18,117, 25,043.30 and 15,115.32

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Solution

The fourth proportional to 18,117, 25,043.30 and 15,115.32 is: 20,894.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117 : 25,043.30 = 15,115.32 : x
  2. Step 2: Convert to fraction form
    18,117/25,043.30 = 15,115.32/x
  3. Step 3: Cross multiply
    18,117x = 25,043.30 × 15,115.32
  4. Step 4: Simplify right side
    18,117x = 378,537,493.36
  5. Step 5: Solve for x
    x = 378,537,493.36/18,117
  6. Step 6: Final answer
    x = 20,894.05

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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.