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Finding the Fourth Proportional to 19,005.48, 28,509.74 and 6,520.48

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Solution

The fourth proportional to 19,005.48, 28,509.74 and 6,520.48 is: 9,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.48 : 28,509.74 = 6,520.48 : x
  2. Step 2: Convert to fraction form
    19,005.48/28,509.74 = 6,520.48/x
  3. Step 3: Cross multiply
    19,005.48x = 28,509.74 × 6,520.48
  4. Step 4: Simplify right side
    19,005.48x = 185,897,189.48
  5. Step 5: Solve for x
    x = 185,897,189.48/19,005.48
  6. Step 6: Final answer
    x = 9,781.24

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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.