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Finding the Fourth Proportional to 8,490.87, 11,718.79 and 4,715.24

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Solution

The fourth proportional to 8,490.87, 11,718.79 and 4,715.24 is: 6,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.87 : 11,718.79 = 4,715.24 : x
  2. Step 2: Convert to fraction form
    8,490.87/11,718.79 = 4,715.24/x
  3. Step 3: Cross multiply
    8,490.87x = 11,718.79 × 4,715.24
  4. Step 4: Simplify right side
    8,490.87x = 55,256,907.36
  5. Step 5: Solve for x
    x = 55,256,907.36/8,490.87
  6. Step 6: Final answer
    x = 6,507.80

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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.