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Finding the Fourth Proportional to 15,003.68, 20,703.74 and 8,289.18

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Solution

The fourth proportional to 15,003.68, 20,703.74 and 8,289.18 is: 11,438.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.68 : 20,703.74 = 8,289.18 : x
  2. Step 2: Convert to fraction form
    15,003.68/20,703.74 = 8,289.18/x
  3. Step 3: Cross multiply
    15,003.68x = 20,703.74 × 8,289.18
  4. Step 4: Simplify right side
    15,003.68x = 171,616,986.09
  5. Step 5: Solve for x
    x = 171,616,986.09/15,003.68
  6. Step 6: Final answer
    x = 11,438.33

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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.