Home / 20,688.34-28,550.28-11,257.06

Finding the Fourth Proportional to 20,688.34, 28,550.28 and 11,257.06

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Solution

The fourth proportional to 20,688.34, 28,550.28 and 11,257.06 is: 15,534.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.34 : 28,550.28 = 11,257.06 : x
  2. Step 2: Convert to fraction form
    20,688.34/28,550.28 = 11,257.06/x
  3. Step 3: Cross multiply
    20,688.34x = 28,550.28 × 11,257.06
  4. Step 4: Simplify right side
    20,688.34x = 321,392,214.98
  5. Step 5: Solve for x
    x = 321,392,214.98/20,688.34
  6. Step 6: Final answer
    x = 15,534.94

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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.