Home / 12,090.60-16,675.40-9,991.08

Finding the Fourth Proportional to 12,090.60, 16,675.40 and 9,991.08

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Solution

The fourth proportional to 12,090.60, 16,675.40 and 9,991.08 is: 13,779.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.60 : 16,675.40 = 9,991.08 : x
  2. Step 2: Convert to fraction form
    12,090.60/16,675.40 = 9,991.08/x
  3. Step 3: Cross multiply
    12,090.60x = 16,675.40 × 9,991.08
  4. Step 4: Simplify right side
    12,090.60x = 166,605,255.43
  5. Step 5: Solve for x
    x = 166,605,255.43/12,090.60
  6. Step 6: Final answer
    x = 13,779.73

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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.