Home / 12,090.60-18,136.80-4,298.40

Finding the Fourth Proportional to 12,090.60, 18,136.80 and 4,298.40

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Solution

The fourth proportional to 12,090.60, 18,136.80 and 4,298.40 is: 6,447.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.60 : 18,136.80 = 4,298.40 : x
  2. Step 2: Convert to fraction form
    12,090.60/18,136.80 = 4,298.40/x
  3. Step 3: Cross multiply
    12,090.60x = 18,136.80 × 4,298.40
  4. Step 4: Simplify right side
    12,090.60x = 77,959,221.12
  5. Step 5: Solve for x
    x = 77,959,221.12/12,090.60
  6. Step 6: Final answer
    x = 6,447.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.