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Finding the Fourth Proportional to 12,090.77, 16,693 and 9,858

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Solution

The fourth proportional to 12,090.77, 16,693 and 9,858 is: 13,610.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.77 : 16,693 = 9,858 : x
  2. Step 2: Convert to fraction form
    12,090.77/16,693 = 9,858/x
  3. Step 3: Cross multiply
    12,090.77x = 16,693 × 9,858
  4. Step 4: Simplify right side
    12,090.77x = 164,559,594
  5. Step 5: Solve for x
    x = 164,559,594/12,090.77
  6. Step 6: Final answer
    x = 13,610.35

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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.