Home / 28,124.20-42,143.10-18,879.40

Finding the Fourth Proportional to 28,124.20, 42,143.10 and 18,879.40

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Solution

The fourth proportional to 28,124.20, 42,143.10 and 18,879.40 is: 28,290.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,124.20 : 42,143.10 = 18,879.40 : x
  2. Step 2: Convert to fraction form
    28,124.20/42,143.10 = 18,879.40/x
  3. Step 3: Cross multiply
    28,124.20x = 42,143.10 × 18,879.40
  4. Step 4: Simplify right side
    28,124.20x = 795,636,442.14
  5. Step 5: Solve for x
    x = 795,636,442.14/28,124.20
  6. Step 6: Final answer
    x = 28,290.10

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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.