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Finding the Fourth Proportional to 9,328.88, 12,851.95 and 6,491.38

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Solution

The fourth proportional to 9,328.88, 12,851.95 and 6,491.38 is: 8,942.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,328.88 : 12,851.95 = 6,491.38 : x
  2. Step 2: Convert to fraction form
    9,328.88/12,851.95 = 6,491.38/x
  3. Step 3: Cross multiply
    9,328.88x = 12,851.95 × 6,491.38
  4. Step 4: Simplify right side
    9,328.88x = 83,426,826.77
  5. Step 5: Solve for x
    x = 83,426,826.77/9,328.88
  6. Step 6: Final answer
    x = 8,942.86

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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.