Home / 15,090.81-22,659.90-12,781.09

Finding the Fourth Proportional to 15,090.81, 22,659.90 and 12,781.09

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Solution

The fourth proportional to 15,090.81, 22,659.90 and 12,781.09 is: 19,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.81 : 22,659.90 = 12,781.09 : x
  2. Step 2: Convert to fraction form
    15,090.81/22,659.90 = 12,781.09/x
  3. Step 3: Cross multiply
    15,090.81x = 22,659.90 × 12,781.09
  4. Step 4: Simplify right side
    15,090.81x = 289,618,273.58
  5. Step 5: Solve for x
    x = 289,618,273.58/15,090.81
  6. Step 6: Final answer
    x = 19,191.70

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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.