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Finding the Fourth Proportional to 14,652.78, 20,220.80 and 7,938.57

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Solution

The fourth proportional to 14,652.78, 20,220.80 and 7,938.57 is: 10,955.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,652.78 : 20,220.80 = 7,938.57 : x
  2. Step 2: Convert to fraction form
    14,652.78/20,220.80 = 7,938.57/x
  3. Step 3: Cross multiply
    14,652.78x = 20,220.80 × 7,938.57
  4. Step 4: Simplify right side
    14,652.78x = 160,524,236.26
  5. Step 5: Solve for x
    x = 160,524,236.26/14,652.78
  6. Step 6: Final answer
    x = 10,955.21

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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.