Home / 20,440.28-28,206.70-11,487.58

Finding the Fourth Proportional to 20,440.28, 28,206.70 and 11,487.58

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Solution

The fourth proportional to 20,440.28, 28,206.70 and 11,487.58 is: 15,852.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.28 : 28,206.70 = 11,487.58 : x
  2. Step 2: Convert to fraction form
    20,440.28/28,206.70 = 11,487.58/x
  3. Step 3: Cross multiply
    20,440.28x = 28,206.70 × 11,487.58
  4. Step 4: Simplify right side
    20,440.28x = 324,026,623.55
  5. Step 5: Solve for x
    x = 324,026,623.55/20,440.28
  6. Step 6: Final answer
    x = 15,852.36

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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.