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Finding the Fourth Proportional to 19,960.40, 29,940.48 and 6,109.40

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Solution

The fourth proportional to 19,960.40, 29,940.48 and 6,109.40 is: 9,164.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,960.40 : 29,940.48 = 6,109.40 : x
  2. Step 2: Convert to fraction form
    19,960.40/29,940.48 = 6,109.40/x
  3. Step 3: Cross multiply
    19,960.40x = 29,940.48 × 6,109.40
  4. Step 4: Simplify right side
    19,960.40x = 182,918,368.51
  5. Step 5: Solve for x
    x = 182,918,368.51/19,960.40
  6. Step 6: Final answer
    x = 9,164.06

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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.