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Finding the Fourth Proportional to 13,756.70, 18,983.96 and 7,469.08

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Solution

The fourth proportional to 13,756.70, 18,983.96 and 7,469.08 is: 10,307.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.70 : 18,983.96 = 7,469.08 : x
  2. Step 2: Convert to fraction form
    13,756.70/18,983.96 = 7,469.08/x
  3. Step 3: Cross multiply
    13,756.70x = 18,983.96 × 7,469.08
  4. Step 4: Simplify right side
    13,756.70x = 141,792,631.15
  5. Step 5: Solve for x
    x = 141,792,631.15/13,756.70
  6. Step 6: Final answer
    x = 10,307.17

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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.