Home / 12,586.78-17,369.40-6,997.78

Finding the Fourth Proportional to 12,586.78, 17,369.40 and 6,997.78

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Solution

The fourth proportional to 12,586.78, 17,369.40 and 6,997.78 is: 9,656.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.78 : 17,369.40 = 6,997.78 : x
  2. Step 2: Convert to fraction form
    12,586.78/17,369.40 = 6,997.78/x
  3. Step 3: Cross multiply
    12,586.78x = 17,369.40 × 6,997.78
  4. Step 4: Simplify right side
    12,586.78x = 121,547,239.93
  5. Step 5: Solve for x
    x = 121,547,239.93/12,586.78
  6. Step 6: Final answer
    x = 9,656.74

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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.