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Finding the Fourth Proportional to 9,143.63, 12,618.74 and 5,164.64

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Solution

The fourth proportional to 9,143.63, 12,618.74 and 5,164.64 is: 7,127.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,143.63 : 12,618.74 = 5,164.64 : x
  2. Step 2: Convert to fraction form
    9,143.63/12,618.74 = 5,164.64/x
  3. Step 3: Cross multiply
    9,143.63x = 12,618.74 × 5,164.64
  4. Step 4: Simplify right side
    9,143.63x = 65,171,199.17
  5. Step 5: Solve for x
    x = 65,171,199.17/9,143.63
  6. Step 6: Final answer
    x = 7,127.50

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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.