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Finding the Fourth Proportional to 20,750.63, 31,126.21 and 6,899.63

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Solution

The fourth proportional to 20,750.63, 31,126.21 and 6,899.63 is: 10,349.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.63 : 31,126.21 = 6,899.63 : x
  2. Step 2: Convert to fraction form
    20,750.63/31,126.21 = 6,899.63/x
  3. Step 3: Cross multiply
    20,750.63x = 31,126.21 × 6,899.63
  4. Step 4: Simplify right side
    20,750.63x = 214,759,176.67
  5. Step 5: Solve for x
    x = 214,759,176.67/20,750.63
  6. Step 6: Final answer
    x = 10,349.53

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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.