Home / 20,330.70-28,056.47-11,378.19

Finding the Fourth Proportional to 20,330.70, 28,056.47 and 11,378.19

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Solution

The fourth proportional to 20,330.70, 28,056.47 and 11,378.19 is: 15,701.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.70 : 28,056.47 = 11,378.19 : x
  2. Step 2: Convert to fraction form
    20,330.70/28,056.47 = 11,378.19/x
  3. Step 3: Cross multiply
    20,330.70x = 28,056.47 × 11,378.19
  4. Step 4: Simplify right side
    20,330.70x = 319,231,846.39
  5. Step 5: Solve for x
    x = 319,231,846.39/20,330.70
  6. Step 6: Final answer
    x = 15,701.96

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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.