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Finding the Fourth Proportional to 8,405.79, 11,599.54 and 4,629.28

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Solution

The fourth proportional to 8,405.79, 11,599.54 and 4,629.28 is: 6,388.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.79 : 11,599.54 = 4,629.28 : x
  2. Step 2: Convert to fraction form
    8,405.79/11,599.54 = 4,629.28/x
  3. Step 3: Cross multiply
    8,405.79x = 11,599.54 × 4,629.28
  4. Step 4: Simplify right side
    8,405.79x = 53,697,518.53
  5. Step 5: Solve for x
    x = 53,697,518.53/8,405.79
  6. Step 6: Final answer
    x = 6,388.16

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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.