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Finding the Fourth Proportional to 12,388.55, 17,088.64 and 7,349.40

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Solution

The fourth proportional to 12,388.55, 17,088.64 and 7,349.40 is: 10,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.55 : 17,088.64 = 7,349.40 : x
  2. Step 2: Convert to fraction form
    12,388.55/17,088.64 = 7,349.40/x
  3. Step 3: Cross multiply
    12,388.55x = 17,088.64 × 7,349.40
  4. Step 4: Simplify right side
    12,388.55x = 125,591,232.44
  5. Step 5: Solve for x
    x = 125,591,232.44/12,388.55
  6. Step 6: Final answer
    x = 10,137.69

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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.