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Finding the Fourth Proportional to 12,650.61, 17,458.89 and 6,985.89

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Solution

The fourth proportional to 12,650.61, 17,458.89 and 6,985.89 is: 9,641.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,650.61 : 17,458.89 = 6,985.89 : x
  2. Step 2: Convert to fraction form
    12,650.61/17,458.89 = 6,985.89/x
  3. Step 3: Cross multiply
    12,650.61x = 17,458.89 × 6,985.89
  4. Step 4: Simplify right side
    12,650.61x = 121,965,885.06
  5. Step 5: Solve for x
    x = 121,965,885.06/12,650.61
  6. Step 6: Final answer
    x = 9,641.11

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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.