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Finding the Fourth Proportional to 9,307.80, 12,844.80 and 5,330.16

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Solution

The fourth proportional to 9,307.80, 12,844.80 and 5,330.16 is: 7,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,307.80 : 12,844.80 = 5,330.16 : x
  2. Step 2: Convert to fraction form
    9,307.80/12,844.80 = 5,330.16/x
  3. Step 3: Cross multiply
    9,307.80x = 12,844.80 × 5,330.16
  4. Step 4: Simplify right side
    9,307.80x = 68,464,839.17
  5. Step 5: Solve for x
    x = 68,464,839.17/9,307.80
  6. Step 6: Final answer
    x = 7,355.64

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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.