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Finding the Fourth Proportional to 18,907.61, 28,364.65 and 5,757.53

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Solution

The fourth proportional to 18,907.61, 28,364.65 and 5,757.53 is: 8,637.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.61 : 28,364.65 = 5,757.53 : x
  2. Step 2: Convert to fraction form
    18,907.61/28,364.65 = 5,757.53/x
  3. Step 3: Cross multiply
    18,907.61x = 28,364.65 × 5,757.53
  4. Step 4: Simplify right side
    18,907.61x = 163,310,167.10
  5. Step 5: Solve for x
    x = 163,310,167.10/18,907.61
  6. Step 6: Final answer
    x = 8,637.27

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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.