Home / 15,858.56-21,879.20-9,480.72

Finding the Fourth Proportional to 15,858.56, 21,879.20 and 9,480.72

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Solution

The fourth proportional to 15,858.56, 21,879.20 and 9,480.72 is: 13,080.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.56 : 21,879.20 = 9,480.72 : x
  2. Step 2: Convert to fraction form
    15,858.56/21,879.20 = 9,480.72/x
  3. Step 3: Cross multiply
    15,858.56x = 21,879.20 × 9,480.72
  4. Step 4: Simplify right side
    15,858.56x = 207,430,521.62
  5. Step 5: Solve for x
    x = 207,430,521.62/15,858.56
  6. Step 6: Final answer
    x = 13,080.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.