Home / 20,803.08-31,204.34-5,220.70

Finding the Fourth Proportional to 20,803.08, 31,204.34 and 5,220.70

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Solution

The fourth proportional to 20,803.08, 31,204.34 and 5,220.70 is: 7,830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.08 : 31,204.34 = 5,220.70 : x
  2. Step 2: Convert to fraction form
    20,803.08/31,204.34 = 5,220.70/x
  3. Step 3: Cross multiply
    20,803.08x = 31,204.34 × 5,220.70
  4. Step 4: Simplify right side
    20,803.08x = 162,908,497.84
  5. Step 5: Solve for x
    x = 162,908,497.84/20,803.08
  6. Step 6: Final answer
    x = 7,830.98

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1.5x scale

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.