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Finding the Fourth Proportional to 19,398.94, 29,100.69 and 6,920.74

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Solution

The fourth proportional to 19,398.94, 29,100.69 and 6,920.74 is: 10,381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.94 : 29,100.69 = 6,920.74 : x
  2. Step 2: Convert to fraction form
    19,398.94/29,100.69 = 6,920.74/x
  3. Step 3: Cross multiply
    19,398.94x = 29,100.69 × 6,920.74
  4. Step 4: Simplify right side
    19,398.94x = 201,398,365.15
  5. Step 5: Solve for x
    x = 201,398,365.15/19,398.94
  6. Step 6: Final answer
    x = 10,381.92

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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.