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Finding the Fourth Proportional to 18,814.54, 25,966.82 and 10,855.20

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Solution

The fourth proportional to 18,814.54, 25,966.82 and 10,855.20 is: 14,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.54 : 25,966.82 = 10,855.20 : x
  2. Step 2: Convert to fraction form
    18,814.54/25,966.82 = 10,855.20/x
  3. Step 3: Cross multiply
    18,814.54x = 25,966.82 × 10,855.20
  4. Step 4: Simplify right side
    18,814.54x = 281,875,024.46
  5. Step 5: Solve for x
    x = 281,875,024.46/18,814.54
  6. Step 6: Final answer
    x = 14,981.77

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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.