Home / 20,187.90-30,245.40-18,875.70

Finding the Fourth Proportional to 20,187.90, 30,245.40 and 18,875.70

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Solution

The fourth proportional to 20,187.90, 30,245.40 and 18,875.70 is: 28,279.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.90 : 30,245.40 = 18,875.70 : x
  2. Step 2: Convert to fraction form
    20,187.90/30,245.40 = 18,875.70/x
  3. Step 3: Cross multiply
    20,187.90x = 30,245.40 × 18,875.70
  4. Step 4: Simplify right side
    20,187.90x = 570,903,096.78
  5. Step 5: Solve for x
    x = 570,903,096.78/20,187.90
  6. Step 6: Final answer
    x = 28,279.47

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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.