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Finding the Fourth Proportional to 19,266.13, 28,899.19 and 5,415.13

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Solution

The fourth proportional to 19,266.13, 28,899.19 and 5,415.13 is: 8,122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.13 : 28,899.19 = 5,415.13 : x
  2. Step 2: Convert to fraction form
    19,266.13/28,899.19 = 5,415.13/x
  3. Step 3: Cross multiply
    19,266.13x = 28,899.19 × 5,415.13
  4. Step 4: Simplify right side
    19,266.13x = 156,492,870.74
  5. Step 5: Solve for x
    x = 156,492,870.74/19,266.13
  6. Step 6: Final answer
    x = 8,122.69

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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.