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Finding the Fourth Proportional to 19,266.47, 28,899.70 and 5,415.47

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Solution

The fourth proportional to 19,266.47, 28,899.70 and 5,415.47 is: 8,123.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.47 : 28,899.70 = 5,415.47 : x
  2. Step 2: Convert to fraction form
    19,266.47/28,899.70 = 5,415.47/x
  3. Step 3: Cross multiply
    19,266.47x = 28,899.70 × 5,415.47
  4. Step 4: Simplify right side
    19,266.47x = 156,505,439.16
  5. Step 5: Solve for x
    x = 156,505,439.16/19,266.47
  6. Step 6: Final answer
    x = 8,123.20

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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.