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Finding the Fourth Proportional to 12,838.64, 17,717.35 and 7,173.40

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Solution

The fourth proportional to 12,838.64, 17,717.35 and 7,173.40 is: 9,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.64 : 17,717.35 = 7,173.40 : x
  2. Step 2: Convert to fraction form
    12,838.64/17,717.35 = 7,173.40/x
  3. Step 3: Cross multiply
    12,838.64x = 17,717.35 × 7,173.40
  4. Step 4: Simplify right side
    12,838.64x = 127,093,602.62
  5. Step 5: Solve for x
    x = 127,093,602.62/12,838.64
  6. Step 6: Final answer
    x = 9,899.30

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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.