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Finding the Fourth Proportional to 11,490.80, 15,859.01 and 7,017.12

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Solution

The fourth proportional to 11,490.80, 15,859.01 and 7,017.12 is: 9,684.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.80 : 15,859.01 = 7,017.12 : x
  2. Step 2: Convert to fraction form
    11,490.80/15,859.01 = 7,017.12/x
  3. Step 3: Cross multiply
    11,490.80x = 15,859.01 × 7,017.12
  4. Step 4: Simplify right side
    11,490.80x = 111,284,593.79
  5. Step 5: Solve for x
    x = 111,284,593.79/11,490.80
  6. Step 6: Final answer
    x = 9,684.67

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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.