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Finding the Fourth Proportional to 19,368.90, 29,010.15 and 15,912.90

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Solution

The fourth proportional to 19,368.90, 29,010.15 and 15,912.90 is: 23,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,368.90 : 29,010.15 = 15,912.90 : x
  2. Step 2: Convert to fraction form
    19,368.90/29,010.15 = 15,912.90/x
  3. Step 3: Cross multiply
    19,368.90x = 29,010.15 × 15,912.90
  4. Step 4: Simplify right side
    19,368.90x = 461,635,615.94
  5. Step 5: Solve for x
    x = 461,635,615.94/19,368.90
  6. Step 6: Final answer
    x = 23,833.86

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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.