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Finding the Fourth Proportional to 15,758.62, 21,746.37 and 8,685.16

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Solution

The fourth proportional to 15,758.62, 21,746.37 and 8,685.16 is: 11,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,758.62 : 21,746.37 = 8,685.16 : x
  2. Step 2: Convert to fraction form
    15,758.62/21,746.37 = 8,685.16/x
  3. Step 3: Cross multiply
    15,758.62x = 21,746.37 × 8,685.16
  4. Step 4: Simplify right side
    15,758.62x = 188,870,702.87
  5. Step 5: Solve for x
    x = 188,870,702.87/15,758.62
  6. Step 6: Final answer
    x = 11,985.23

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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.