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Finding the Fourth Proportional to 5,720.61, 7,876.91 and 5,008.47

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Solution

The fourth proportional to 5,720.61, 7,876.91 and 5,008.47 is: 6,896.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.61 : 7,876.91 = 5,008.47 : x
  2. Step 2: Convert to fraction form
    5,720.61/7,876.91 = 5,008.47/x
  3. Step 3: Cross multiply
    5,720.61x = 7,876.91 × 5,008.47
  4. Step 4: Simplify right side
    5,720.61x = 39,451,267.43
  5. Step 5: Solve for x
    x = 39,451,267.43/5,720.61
  6. Step 6: Final answer
    x = 6,896.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.