Home / 11,726.78-16,182.90-6,421.55

Finding the Fourth Proportional to 11,726.78, 16,182.90 and 6,421.55

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Solution

The fourth proportional to 11,726.78, 16,182.90 and 6,421.55 is: 8,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,726.78 : 16,182.90 = 6,421.55 : x
  2. Step 2: Convert to fraction form
    11,726.78/16,182.90 = 6,421.55/x
  3. Step 3: Cross multiply
    11,726.78x = 16,182.90 × 6,421.55
  4. Step 4: Simplify right side
    11,726.78x = 103,919,220.58
  5. Step 5: Solve for x
    x = 103,919,220.58/11,726.78
  6. Step 6: Final answer
    x = 8,861.70

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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.