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Finding the Fourth Proportional to 18,908.16, 28,358.44 and 17,971.44

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Solution

The fourth proportional to 18,908.16, 28,358.44 and 17,971.44 is: 26,953.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.16 : 28,358.44 = 17,971.44 : x
  2. Step 2: Convert to fraction form
    18,908.16/28,358.44 = 17,971.44/x
  3. Step 3: Cross multiply
    18,908.16x = 28,358.44 × 17,971.44
  4. Step 4: Simplify right side
    18,908.16x = 509,642,002.95
  5. Step 5: Solve for x
    x = 509,642,002.95/18,908.16
  6. Step 6: Final answer
    x = 26,953.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.