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Finding the Fourth Proportional to 19,805.69, 29,715.15 and 6,479.29

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Solution

The fourth proportional to 19,805.69, 29,715.15 and 6,479.29 is: 9,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,805.69 : 29,715.15 = 6,479.29 : x
  2. Step 2: Convert to fraction form
    19,805.69/29,715.15 = 6,479.29/x
  3. Step 3: Cross multiply
    19,805.69x = 29,715.15 × 6,479.29
  4. Step 4: Simplify right side
    19,805.69x = 192,533,041.85
  5. Step 5: Solve for x
    x = 192,533,041.85/19,805.69
  6. Step 6: Final answer
    x = 9,721.10

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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.