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Finding the Fourth Proportional to 13,317.80, 19,978.86 and 4,998.47

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Solution

The fourth proportional to 13,317.80, 19,978.86 and 4,998.47 is: 7,498.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,317.80 : 19,978.86 = 4,998.47 : x
  2. Step 2: Convert to fraction form
    13,317.80/19,978.86 = 4,998.47/x
  3. Step 3: Cross multiply
    13,317.80x = 19,978.86 × 4,998.47
  4. Step 4: Simplify right side
    13,317.80x = 99,863,632.45
  5. Step 5: Solve for x
    x = 99,863,632.45/13,317.80
  6. Step 6: Final answer
    x = 7,498.51

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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.