Home / 21,090.60-29,099.34-12,140.64

Finding the Fourth Proportional to 21,090.60, 29,099.34 and 12,140.64

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Solution

The fourth proportional to 21,090.60, 29,099.34 and 12,140.64 is: 16,750.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.60 : 29,099.34 = 12,140.64 : x
  2. Step 2: Convert to fraction form
    21,090.60/29,099.34 = 12,140.64/x
  3. Step 3: Cross multiply
    21,090.60x = 29,099.34 × 12,140.64
  4. Step 4: Simplify right side
    21,090.60x = 353,284,611.18
  5. Step 5: Solve for x
    x = 353,284,611.18/21,090.60
  6. Step 6: Final answer
    x = 16,750.81

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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.