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Finding the Fourth Proportional to 8,339.64, 11,506.91 and 5,315.91

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Solution

The fourth proportional to 8,339.64, 11,506.91 and 5,315.91 is: 7,334.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,339.64 : 11,506.91 = 5,315.91 : x
  2. Step 2: Convert to fraction form
    8,339.64/11,506.91 = 5,315.91/x
  3. Step 3: Cross multiply
    8,339.64x = 11,506.91 × 5,315.91
  4. Step 4: Simplify right side
    8,339.64x = 61,169,671.36
  5. Step 5: Solve for x
    x = 61,169,671.36/8,339.64
  6. Step 6: Final answer
    x = 7,334.81

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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.