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Finding the Fourth Proportional to 9,322, 12,864.36 and 5,130.16

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Solution

The fourth proportional to 9,322, 12,864.36 and 5,130.16 is: 7,079.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,322 : 12,864.36 = 5,130.16 : x
  2. Step 2: Convert to fraction form
    9,322/12,864.36 = 5,130.16/x
  3. Step 3: Cross multiply
    9,322x = 12,864.36 × 5,130.16
  4. Step 4: Simplify right side
    9,322x = 65,996,225.10
  5. Step 5: Solve for x
    x = 65,996,225.10/9,322
  6. Step 6: Final answer
    x = 7,079.62

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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.