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Finding the Fourth Proportional to 13,959.86, 20,938.55 and 4,599.80

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Solution

The fourth proportional to 13,959.86, 20,938.55 and 4,599.80 is: 6,899.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.86 : 20,938.55 = 4,599.80 : x
  2. Step 2: Convert to fraction form
    13,959.86/20,938.55 = 4,599.80/x
  3. Step 3: Cross multiply
    13,959.86x = 20,938.55 × 4,599.80
  4. Step 4: Simplify right side
    13,959.86x = 96,313,014.60
  5. Step 5: Solve for x
    x = 96,313,014.60/13,959.86
  6. Step 6: Final answer
    x = 6,899.28

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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.