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Finding the Fourth Proportional to 12,383.98, 17,089.76 and 6,718.64

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Solution

The fourth proportional to 12,383.98, 17,089.76 and 6,718.64 is: 9,271.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.98 : 17,089.76 = 6,718.64 : x
  2. Step 2: Convert to fraction form
    12,383.98/17,089.76 = 6,718.64/x
  3. Step 3: Cross multiply
    12,383.98x = 17,089.76 × 6,718.64
  4. Step 4: Simplify right side
    12,383.98x = 114,819,876.47
  5. Step 5: Solve for x
    x = 114,819,876.47/12,383.98
  6. Step 6: Final answer
    x = 9,271.65

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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.