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Finding the Fourth Proportional to 19,210.62, 28,812.30 and 6,561

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Solution

The fourth proportional to 19,210.62, 28,812.30 and 6,561 is: 9,840.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,210.62 : 28,812.30 = 6,561 : x
  2. Step 2: Convert to fraction form
    19,210.62/28,812.30 = 6,561/x
  3. Step 3: Cross multiply
    19,210.62x = 28,812.30 × 6,561
  4. Step 4: Simplify right side
    19,210.62x = 189,037,500.30
  5. Step 5: Solve for x
    x = 189,037,500.30/19,210.62
  6. Step 6: Final answer
    x = 9,840.26

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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.