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Finding the Fourth Proportional to 8,687.64, 13,031.46 and 4,816.65

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Solution

The fourth proportional to 8,687.64, 13,031.46 and 4,816.65 is: 7,224.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.64 : 13,031.46 = 4,816.65 : x
  2. Step 2: Convert to fraction form
    8,687.64/13,031.46 = 4,816.65/x
  3. Step 3: Cross multiply
    8,687.64x = 13,031.46 × 4,816.65
  4. Step 4: Simplify right side
    8,687.64x = 62,767,981.81
  5. Step 5: Solve for x
    x = 62,767,981.81/8,687.64
  6. Step 6: Final answer
    x = 7,224.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.