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Finding the Fourth Proportional to 9,320.63, 12,862.73 and 5,128.88

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Solution

The fourth proportional to 9,320.63, 12,862.73 and 5,128.88 is: 7,078.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,320.63 : 12,862.73 = 5,128.88 : x
  2. Step 2: Convert to fraction form
    9,320.63/12,862.73 = 5,128.88/x
  3. Step 3: Cross multiply
    9,320.63x = 12,862.73 × 5,128.88
  4. Step 4: Simplify right side
    9,320.63x = 65,971,347.15
  5. Step 5: Solve for x
    x = 65,971,347.15/9,320.63
  6. Step 6: Final answer
    x = 7,078.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.