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Finding the Fourth Proportional to 6,885.48, 10,389.76 and 6,885.48

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Solution

The fourth proportional to 6,885.48, 10,389.76 and 6,885.48 is: 10,389.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,885.48 : 10,389.76 = 6,885.48 : x
  2. Step 2: Convert to fraction form
    6,885.48/10,389.76 = 6,885.48/x
  3. Step 3: Cross multiply
    6,885.48x = 10,389.76 × 6,885.48
  4. Step 4: Simplify right side
    6,885.48x = 71,538,484.68
  5. Step 5: Solve for x
    x = 71,538,484.68/6,885.48
  6. Step 6: Final answer
    x = 10,389.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.