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Finding the Fourth Proportional to 10,661.56, 14,715.54 and 6,469

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Solution

The fourth proportional to 10,661.56, 14,715.54 and 6,469 is: 8,928.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.56 : 14,715.54 = 6,469 : x
  2. Step 2: Convert to fraction form
    10,661.56/14,715.54 = 6,469/x
  3. Step 3: Cross multiply
    10,661.56x = 14,715.54 × 6,469
  4. Step 4: Simplify right side
    10,661.56x = 95,194,828.26
  5. Step 5: Solve for x
    x = 95,194,828.26/10,661.56
  6. Step 6: Final answer
    x = 8,928.79

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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.