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Finding the Fourth Proportional to 19,812.86, 29,700.67 and 6,655.99

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Solution

The fourth proportional to 19,812.86, 29,700.67 and 6,655.99 is: 9,977.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.86 : 29,700.67 = 6,655.99 : x
  2. Step 2: Convert to fraction form
    19,812.86/29,700.67 = 6,655.99/x
  3. Step 3: Cross multiply
    19,812.86x = 29,700.67 × 6,655.99
  4. Step 4: Simplify right side
    19,812.86x = 197,687,362.51
  5. Step 5: Solve for x
    x = 197,687,362.51/19,812.86
  6. Step 6: Final answer
    x = 9,977.73

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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.