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Finding the Fourth Proportional to 6,666.72, 9,998.64 and 3,155.22

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Solution

The fourth proportional to 6,666.72, 9,998.64 and 3,155.22 is: 4,732.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.72 : 9,998.64 = 3,155.22 : x
  2. Step 2: Convert to fraction form
    6,666.72/9,998.64 = 3,155.22/x
  3. Step 3: Cross multiply
    6,666.72x = 9,998.64 × 3,155.22
  4. Step 4: Simplify right side
    6,666.72x = 31,547,908.90
  5. Step 5: Solve for x
    x = 31,547,908.90/6,666.72
  6. Step 6: Final answer
    x = 4,732.15

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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.