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Finding the Fourth Proportional to 19,397.98, 29,109.74 and 10,639.05

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Solution

The fourth proportional to 19,397.98, 29,109.74 and 10,639.05 is: 15,965.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,397.98 : 29,109.74 = 10,639.05 : x
  2. Step 2: Convert to fraction form
    19,397.98/29,109.74 = 10,639.05/x
  3. Step 3: Cross multiply
    19,397.98x = 29,109.74 × 10,639.05
  4. Step 4: Simplify right side
    19,397.98x = 309,699,979.35
  5. Step 5: Solve for x
    x = 309,699,979.35/19,397.98
  6. Step 6: Final answer
    x = 15,965.58

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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.