Home / 21,180.76-29,229.47-11,749.32

Finding the Fourth Proportional to 21,180.76, 29,229.47 and 11,749.32

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Solution

The fourth proportional to 21,180.76, 29,229.47 and 11,749.32 is: 16,214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.76 : 29,229.47 = 11,749.32 : x
  2. Step 2: Convert to fraction form
    21,180.76/29,229.47 = 11,749.32/x
  3. Step 3: Cross multiply
    21,180.76x = 29,229.47 × 11,749.32
  4. Step 4: Simplify right side
    21,180.76x = 343,426,447.86
  5. Step 5: Solve for x
    x = 343,426,447.86/21,180.76
  6. Step 6: Final answer
    x = 16,214.08

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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.