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Finding the Fourth Proportional to 10,479.23, 15,719.04 and 8,389.53

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Solution

The fourth proportional to 10,479.23, 15,719.04 and 8,389.53 is: 12,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.23 : 15,719.04 = 8,389.53 : x
  2. Step 2: Convert to fraction form
    10,479.23/15,719.04 = 8,389.53/x
  3. Step 3: Cross multiply
    10,479.23x = 15,719.04 × 8,389.53
  4. Step 4: Simplify right side
    10,479.23x = 131,875,357.65
  5. Step 5: Solve for x
    x = 131,875,357.65/10,479.23
  6. Step 6: Final answer
    x = 12,584.45

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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.