Home / 20,819.32-28,733.40-11,864.77

Finding the Fourth Proportional to 20,819.32, 28,733.40 and 11,864.77

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Solution

The fourth proportional to 20,819.32, 28,733.40 and 11,864.77 is: 16,374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.32 : 28,733.40 = 11,864.77 : x
  2. Step 2: Convert to fraction form
    20,819.32/28,733.40 = 11,864.77/x
  3. Step 3: Cross multiply
    20,819.32x = 28,733.40 × 11,864.77
  4. Step 4: Simplify right side
    20,819.32x = 340,915,182.32
  5. Step 5: Solve for x
    x = 340,915,182.32/20,819.32
  6. Step 6: Final answer
    x = 16,374.94

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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.