Home / 20,330.98-28,056.81-11,377.90

Finding the Fourth Proportional to 20,330.98, 28,056.81 and 11,377.90

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Solution

The fourth proportional to 20,330.98, 28,056.81 and 11,377.90 is: 15,701.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.98 : 28,056.81 = 11,377.90 : x
  2. Step 2: Convert to fraction form
    20,330.98/28,056.81 = 11,377.90/x
  3. Step 3: Cross multiply
    20,330.98x = 28,056.81 × 11,377.90
  4. Step 4: Simplify right side
    20,330.98x = 319,227,578.50
  5. Step 5: Solve for x
    x = 319,227,578.50/20,330.98
  6. Step 6: Final answer
    x = 15,701.53

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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.