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Finding the Fourth Proportional to 19,222.90, 28,829.55 and 7,374.10

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Solution

The fourth proportional to 19,222.90, 28,829.55 and 7,374.10 is: 11,059.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,222.90 : 28,829.55 = 7,374.10 : x
  2. Step 2: Convert to fraction form
    19,222.90/28,829.55 = 7,374.10/x
  3. Step 3: Cross multiply
    19,222.90x = 28,829.55 × 7,374.10
  4. Step 4: Simplify right side
    19,222.90x = 212,591,984.66
  5. Step 5: Solve for x
    x = 212,591,984.66/19,222.90
  6. Step 6: Final answer
    x = 11,059.31

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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.