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Finding the Fourth Proportional to 9,417.77, 12,990.78 and 6,768.77

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Solution

The fourth proportional to 9,417.77, 12,990.78 and 6,768.77 is: 9,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,417.77 : 12,990.78 = 6,768.77 : x
  2. Step 2: Convert to fraction form
    9,417.77/12,990.78 = 6,768.77/x
  3. Step 3: Cross multiply
    9,417.77x = 12,990.78 × 6,768.77
  4. Step 4: Simplify right side
    9,417.77x = 87,931,536.99
  5. Step 5: Solve for x
    x = 87,931,536.99/9,417.77
  6. Step 6: Final answer
    x = 9,336.77

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Double scale
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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.