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Finding the Fourth Proportional to 10,665.61, 14,723.26 and 6,890.62

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Solution

The fourth proportional to 10,665.61, 14,723.26 and 6,890.62 is: 9,512.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,665.61 : 14,723.26 = 6,890.62 : x
  2. Step 2: Convert to fraction form
    10,665.61/14,723.26 = 6,890.62/x
  3. Step 3: Cross multiply
    10,665.61x = 14,723.26 × 6,890.62
  4. Step 4: Simplify right side
    10,665.61x = 101,452,389.82
  5. Step 5: Solve for x
    x = 101,452,389.82/10,665.61
  6. Step 6: Final answer
    x = 9,512.10

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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.