Home / 20,803.07-31,204.33-5,220.70

Finding the Fourth Proportional to 20,803.07, 31,204.33 and 5,220.70

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Solution

The fourth proportional to 20,803.07, 31,204.33 and 5,220.70 is: 7,830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.07 : 31,204.33 = 5,220.70 : x
  2. Step 2: Convert to fraction form
    20,803.07/31,204.33 = 5,220.70/x
  3. Step 3: Cross multiply
    20,803.07x = 31,204.33 × 5,220.70
  4. Step 4: Simplify right side
    20,803.07x = 162,908,445.63
  5. Step 5: Solve for x
    x = 162,908,445.63/20,803.07
  6. Step 6: Final answer
    x = 7,830.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.