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Finding the Fourth Proportional to 19,902.70, 29,854.07 and 7,422.53

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Solution

The fourth proportional to 19,902.70, 29,854.07 and 7,422.53 is: 11,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,902.70 : 29,854.07 = 7,422.53 : x
  2. Step 2: Convert to fraction form
    19,902.70/29,854.07 = 7,422.53/x
  3. Step 3: Cross multiply
    19,902.70x = 29,854.07 × 7,422.53
  4. Step 4: Simplify right side
    19,902.70x = 221,592,693.08
  5. Step 5: Solve for x
    x = 221,592,693.08/19,902.70
  6. Step 6: Final answer
    x = 11,133.80

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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.