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Finding the Fourth Proportional to 19,023.48, 28,509.66 and 7,917.30

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Solution

The fourth proportional to 19,023.48, 28,509.66 and 7,917.30 is: 11,865.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,023.48 : 28,509.66 = 7,917.30 : x
  2. Step 2: Convert to fraction form
    19,023.48/28,509.66 = 7,917.30/x
  3. Step 3: Cross multiply
    19,023.48x = 28,509.66 × 7,917.30
  4. Step 4: Simplify right side
    19,023.48x = 225,719,531.12
  5. Step 5: Solve for x
    x = 225,719,531.12/19,023.48
  6. Step 6: Final answer
    x = 11,865.31

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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.