Home / 28,240.11-38,971.17-15,664.86

Finding the Fourth Proportional to 28,240.11, 38,971.17 and 15,664.86

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Solution

The fourth proportional to 28,240.11, 38,971.17 and 15,664.86 is: 21,617.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.11 : 38,971.17 = 15,664.86 : x
  2. Step 2: Convert to fraction form
    28,240.11/38,971.17 = 15,664.86/x
  3. Step 3: Cross multiply
    28,240.11x = 38,971.17 × 15,664.86
  4. Step 4: Simplify right side
    28,240.11x = 610,477,922.09
  5. Step 5: Solve for x
    x = 610,477,922.09/28,240.11
  6. Step 6: Final answer
    x = 21,617.41

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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.