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Finding the Fourth Proportional to 18,869.17, 28,303.80 and 5,018.17

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Solution

The fourth proportional to 18,869.17, 28,303.80 and 5,018.17 is: 7,527.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.17 : 28,303.80 = 5,018.17 : x
  2. Step 2: Convert to fraction form
    18,869.17/28,303.80 = 5,018.17/x
  3. Step 3: Cross multiply
    18,869.17x = 28,303.80 × 5,018.17
  4. Step 4: Simplify right side
    18,869.17x = 142,033,280.05
  5. Step 5: Solve for x
    x = 142,033,280.05/18,869.17
  6. Step 6: Final answer
    x = 7,527.27

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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.