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Finding the Fourth Proportional to 9,987.99, 13,841.69 and 9,847.05

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Solution

The fourth proportional to 9,987.99, 13,841.69 and 9,847.05 is: 13,646.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.99 : 13,841.69 = 9,847.05 : x
  2. Step 2: Convert to fraction form
    9,987.99/13,841.69 = 9,847.05/x
  3. Step 3: Cross multiply
    9,987.99x = 13,841.69 × 9,847.05
  4. Step 4: Simplify right side
    9,987.99x = 136,299,813.51
  5. Step 5: Solve for x
    x = 136,299,813.51/9,987.99
  6. Step 6: Final answer
    x = 13,646.37

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.