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Finding the Fourth Proportional to 9,920.26, 13,690.71 and 5,671.48

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Solution

The fourth proportional to 9,920.26, 13,690.71 and 5,671.48 is: 7,827.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.26 : 13,690.71 = 5,671.48 : x
  2. Step 2: Convert to fraction form
    9,920.26/13,690.71 = 5,671.48/x
  3. Step 3: Cross multiply
    9,920.26x = 13,690.71 × 5,671.48
  4. Step 4: Simplify right side
    9,920.26x = 77,646,587.95
  5. Step 5: Solve for x
    x = 77,646,587.95/9,920.26
  6. Step 6: Final answer
    x = 7,827.07

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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.