Home / 19,557.60-29,350.80-7,879.20

Finding the Fourth Proportional to 19,557.60, 29,350.80 and 7,879.20

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Solution

The fourth proportional to 19,557.60, 29,350.80 and 7,879.20 is: 11,824.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,557.60 : 29,350.80 = 7,879.20 : x
  2. Step 2: Convert to fraction form
    19,557.60/29,350.80 = 7,879.20/x
  3. Step 3: Cross multiply
    19,557.60x = 29,350.80 × 7,879.20
  4. Step 4: Simplify right side
    19,557.60x = 231,260,823.36
  5. Step 5: Solve for x
    x = 231,260,823.36/19,557.60
  6. Step 6: Final answer
    x = 11,824.60

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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.