Home / 20,659.32-28,511.70-11,709.72

Finding the Fourth Proportional to 20,659.32, 28,511.70 and 11,709.72

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Solution

The fourth proportional to 20,659.32, 28,511.70 and 11,709.72 is: 16,160.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.32 : 28,511.70 = 11,709.72 : x
  2. Step 2: Convert to fraction form
    20,659.32/28,511.70 = 11,709.72/x
  3. Step 3: Cross multiply
    20,659.32x = 28,511.70 × 11,709.72
  4. Step 4: Simplify right side
    20,659.32x = 333,864,023.72
  5. Step 5: Solve for x
    x = 333,864,023.72/20,659.32
  6. Step 6: Final answer
    x = 16,160.46

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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.