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Finding the Fourth Proportional to 18,900.14, 28,330.16 and 9,018.54

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Solution

The fourth proportional to 18,900.14, 28,330.16 and 9,018.54 is: 13,518.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.14 : 28,330.16 = 9,018.54 : x
  2. Step 2: Convert to fraction form
    18,900.14/28,330.16 = 9,018.54/x
  3. Step 3: Cross multiply
    18,900.14x = 28,330.16 × 9,018.54
  4. Step 4: Simplify right side
    18,900.14x = 255,496,636.07
  5. Step 5: Solve for x
    x = 255,496,636.07/18,900.14
  6. Step 6: Final answer
    x = 13,518.24

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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.