Home / 28,211.75-42,317.78-8,490.18

Finding the Fourth Proportional to 28,211.75, 42,317.78 and 8,490.18

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Solution

The fourth proportional to 28,211.75, 42,317.78 and 8,490.18 is: 12,735.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.75 : 42,317.78 = 8,490.18 : x
  2. Step 2: Convert to fraction form
    28,211.75/42,317.78 = 8,490.18/x
  3. Step 3: Cross multiply
    28,211.75x = 42,317.78 × 8,490.18
  4. Step 4: Simplify right side
    28,211.75x = 359,285,569.40
  5. Step 5: Solve for x
    x = 359,285,569.40/28,211.75
  6. Step 6: Final answer
    x = 12,735.32

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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.