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Finding the Fourth Proportional to 18,954.70, 28,432.10 and 5,807.08

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Solution

The fourth proportional to 18,954.70, 28,432.10 and 5,807.08 is: 8,710.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.70 : 28,432.10 = 5,807.08 : x
  2. Step 2: Convert to fraction form
    18,954.70/28,432.10 = 5,807.08/x
  3. Step 3: Cross multiply
    18,954.70x = 28,432.10 × 5,807.08
  4. Step 4: Simplify right side
    18,954.70x = 165,107,479.27
  5. Step 5: Solve for x
    x = 165,107,479.27/18,954.70
  6. Step 6: Final answer
    x = 8,710.64

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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.