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Finding the Fourth Proportional to 15,659.10, 21,951.90 and 15,659.10

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Solution

The fourth proportional to 15,659.10, 21,951.90 and 15,659.10 is: 21,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.10 : 21,951.90 = 15,659.10 : x
  2. Step 2: Convert to fraction form
    15,659.10/21,951.90 = 15,659.10/x
  3. Step 3: Cross multiply
    15,659.10x = 21,951.90 × 15,659.10
  4. Step 4: Simplify right side
    15,659.10x = 343,746,997.29
  5. Step 5: Solve for x
    x = 343,746,997.29/15,659.10
  6. Step 6: Final answer
    x = 21,951.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.