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Finding the Fourth Proportional to 8,782.65, 12,120.16 and 4,803.68

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Solution

The fourth proportional to 8,782.65, 12,120.16 and 4,803.68 is: 6,629.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.65 : 12,120.16 = 4,803.68 : x
  2. Step 2: Convert to fraction form
    8,782.65/12,120.16 = 4,803.68/x
  3. Step 3: Cross multiply
    8,782.65x = 12,120.16 × 4,803.68
  4. Step 4: Simplify right side
    8,782.65x = 58,221,349.89
  5. Step 5: Solve for x
    x = 58,221,349.89/8,782.65
  6. Step 6: Final answer
    x = 6,629.13

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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.