Home / 20,905.68-28,848.36-11,472.48

Finding the Fourth Proportional to 20,905.68, 28,848.36 and 11,472.48

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Solution

The fourth proportional to 20,905.68, 28,848.36 and 11,472.48 is: 15,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.68 : 28,848.36 = 11,472.48 : x
  2. Step 2: Convert to fraction form
    20,905.68/28,848.36 = 11,472.48/x
  3. Step 3: Cross multiply
    20,905.68x = 28,848.36 × 11,472.48
  4. Step 4: Simplify right side
    20,905.68x = 330,962,233.13
  5. Step 5: Solve for x
    x = 330,962,233.13/20,905.68
  6. Step 6: Final answer
    x = 15,831.21

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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.