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Finding the Fourth Proportional to 19,391.94, 29,090.65 and 6,909.29

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Solution

The fourth proportional to 19,391.94, 29,090.65 and 6,909.29 is: 10,364.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,391.94 : 29,090.65 = 6,909.29 : x
  2. Step 2: Convert to fraction form
    19,391.94/29,090.65 = 6,909.29/x
  3. Step 3: Cross multiply
    19,391.94x = 29,090.65 × 6,909.29
  4. Step 4: Simplify right side
    19,391.94x = 200,995,792.59
  5. Step 5: Solve for x
    x = 200,995,792.59/19,391.94
  6. Step 6: Final answer
    x = 10,364.91

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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.