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Finding the Fourth Proportional to 14,652.80, 20,220.90 and 7,938.39

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Solution

The fourth proportional to 14,652.80, 20,220.90 and 7,938.39 is: 10,955.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,652.80 : 20,220.90 = 7,938.39 : x
  2. Step 2: Convert to fraction form
    14,652.80/20,220.90 = 7,938.39/x
  3. Step 3: Cross multiply
    14,652.80x = 20,220.90 × 7,938.39
  4. Step 4: Simplify right side
    14,652.80x = 160,521,390.35
  5. Step 5: Solve for x
    x = 160,521,390.35/14,652.80
  6. Step 6: Final answer
    x = 10,955.00

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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.