Home / 15,879.24-21,899.70-9,904.68

Finding the Fourth Proportional to 15,879.24, 21,899.70 and 9,904.68

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Solution

The fourth proportional to 15,879.24, 21,899.70 and 9,904.68 is: 13,659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.24 : 21,899.70 = 9,904.68 : x
  2. Step 2: Convert to fraction form
    15,879.24/21,899.70 = 9,904.68/x
  3. Step 3: Cross multiply
    15,879.24x = 21,899.70 × 9,904.68
  4. Step 4: Simplify right side
    15,879.24x = 216,909,520.60
  5. Step 5: Solve for x
    x = 216,909,520.60/15,879.24
  6. Step 6: Final answer
    x = 13,659.94

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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.