Home / 18,970.75-28,456.08-6,490.90

Finding the Fourth Proportional to 18,970.75, 28,456.08 and 6,490.90

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Solution

The fourth proportional to 18,970.75, 28,456.08 and 6,490.90 is: 9,736.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.75 : 28,456.08 = 6,490.90 : x
  2. Step 2: Convert to fraction form
    18,970.75/28,456.08 = 6,490.90/x
  3. Step 3: Cross multiply
    18,970.75x = 28,456.08 × 6,490.90
  4. Step 4: Simplify right side
    18,970.75x = 184,705,569.67
  5. Step 5: Solve for x
    x = 184,705,569.67/18,970.75
  6. Step 6: Final answer
    x = 9,736.33

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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.