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Finding the Fourth Proportional to 18,411.30, 27,641.05 and 10,928.52

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Solution

The fourth proportional to 18,411.30, 27,641.05 and 10,928.52 is: 16,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.30 : 27,641.05 = 10,928.52 : x
  2. Step 2: Convert to fraction form
    18,411.30/27,641.05 = 10,928.52/x
  3. Step 3: Cross multiply
    18,411.30x = 27,641.05 × 10,928.52
  4. Step 4: Simplify right side
    18,411.30x = 302,075,740.42
  5. Step 5: Solve for x
    x = 302,075,740.42/18,411.30
  6. Step 6: Final answer
    x = 16,407.08

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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.