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Finding the Fourth Proportional to 18,901.39, 28,350.93 and 8,368.34

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Solution

The fourth proportional to 18,901.39, 28,350.93 and 8,368.34 is: 12,551.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,901.39 : 28,350.93 = 8,368.34 : x
  2. Step 2: Convert to fraction form
    18,901.39/28,350.93 = 8,368.34/x
  3. Step 3: Cross multiply
    18,901.39x = 28,350.93 × 8,368.34
  4. Step 4: Simplify right side
    18,901.39x = 237,250,111.18
  5. Step 5: Solve for x
    x = 237,250,111.18/18,901.39
  6. Step 6: Final answer
    x = 12,551.99

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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.