Home / 20,518.99-30,778.52-5,728.30

Finding the Fourth Proportional to 20,518.99, 30,778.52 and 5,728.30

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Solution

The fourth proportional to 20,518.99, 30,778.52 and 5,728.30 is: 8,592.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.99 : 30,778.52 = 5,728.30 : x
  2. Step 2: Convert to fraction form
    20,518.99/30,778.52 = 5,728.30/x
  3. Step 3: Cross multiply
    20,518.99x = 30,778.52 × 5,728.30
  4. Step 4: Simplify right side
    20,518.99x = 176,308,490.53
  5. Step 5: Solve for x
    x = 176,308,490.53/20,518.99
  6. Step 6: Final answer
    x = 8,592.46

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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.