Home / 20,090.90-30,136.35-19,237.70

Finding the Fourth Proportional to 20,090.90, 30,136.35 and 19,237.70

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Solution

The fourth proportional to 20,090.90, 30,136.35 and 19,237.70 is: 28,856.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.90 : 30,136.35 = 19,237.70 : x
  2. Step 2: Convert to fraction form
    20,090.90/30,136.35 = 19,237.70/x
  3. Step 3: Cross multiply
    20,090.90x = 30,136.35 × 19,237.70
  4. Step 4: Simplify right side
    20,090.90x = 579,754,060.40
  5. Step 5: Solve for x
    x = 579,754,060.40/20,090.90
  6. Step 6: Final answer
    x = 28,856.55

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Similar ratio
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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.