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Finding the Fourth Proportional to 9,911.65, 14,872.67 and 4,368.79

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Solution

The fourth proportional to 9,911.65, 14,872.67 and 4,368.79 is: 6,555.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,911.65 : 14,872.67 = 4,368.79 : x
  2. Step 2: Convert to fraction form
    9,911.65/14,872.67 = 4,368.79/x
  3. Step 3: Cross multiply
    9,911.65x = 14,872.67 × 4,368.79
  4. Step 4: Simplify right side
    9,911.65x = 64,975,545.71
  5. Step 5: Solve for x
    x = 64,975,545.71/9,911.65
  6. Step 6: Final answer
    x = 6,555.47

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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.