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Finding the Fourth Proportional to 9,999.60, 13,782.99 and 7,090.13

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Solution

The fourth proportional to 9,999.60, 13,782.99 and 7,090.13 is: 9,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.60 : 13,782.99 = 7,090.13 : x
  2. Step 2: Convert to fraction form
    9,999.60/13,782.99 = 7,090.13/x
  3. Step 3: Cross multiply
    9,999.60x = 13,782.99 × 7,090.13
  4. Step 4: Simplify right side
    9,999.60x = 97,723,251.93
  5. Step 5: Solve for x
    x = 97,723,251.93/9,999.60
  6. Step 6: Final answer
    x = 9,772.71

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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.