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Finding the Fourth Proportional to 14,703.75, 20,291.18 and 7,989.39

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Solution

The fourth proportional to 14,703.75, 20,291.18 and 7,989.39 is: 11,025.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,703.75 : 20,291.18 = 7,989.39 : x
  2. Step 2: Convert to fraction form
    14,703.75/20,291.18 = 7,989.39/x
  3. Step 3: Cross multiply
    14,703.75x = 20,291.18 × 7,989.39
  4. Step 4: Simplify right side
    14,703.75x = 162,114,110.63
  5. Step 5: Solve for x
    x = 162,114,110.63/14,703.75
  6. Step 6: Final answer
    x = 11,025.36

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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.