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Finding the Fourth Proportional to 13,317.62, 19,978.85 and 6,657.59

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Solution

The fourth proportional to 13,317.62, 19,978.85 and 6,657.59 is: 9,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,317.62 : 19,978.85 = 6,657.59 : x
  2. Step 2: Convert to fraction form
    13,317.62/19,978.85 = 6,657.59/x
  3. Step 3: Cross multiply
    13,317.62x = 19,978.85 × 6,657.59
  4. Step 4: Simplify right side
    13,317.62x = 133,011,058.56
  5. Step 5: Solve for x
    x = 133,011,058.56/13,317.62
  6. Step 6: Final answer
    x = 9,987.60

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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.