Home / 28,114.20-42,171.30-19,657.80

Finding the Fourth Proportional to 28,114.20, 42,171.30 and 19,657.80

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Solution

The fourth proportional to 28,114.20, 42,171.30 and 19,657.80 is: 29,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.20 : 42,171.30 = 19,657.80 : x
  2. Step 2: Convert to fraction form
    28,114.20/42,171.30 = 19,657.80/x
  3. Step 3: Cross multiply
    28,114.20x = 42,171.30 × 19,657.80
  4. Step 4: Simplify right side
    28,114.20x = 828,994,981.14
  5. Step 5: Solve for x
    x = 828,994,981.14/28,114.20
  6. Step 6: Final answer
    x = 29,486.70

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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.