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Finding the Fourth Proportional to 15,671.70, 21,998.70 and 15,671.70

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Solution

The fourth proportional to 15,671.70, 21,998.70 and 15,671.70 is: 21,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,671.70 : 21,998.70 = 15,671.70 : x
  2. Step 2: Convert to fraction form
    15,671.70/21,998.70 = 15,671.70/x
  3. Step 3: Cross multiply
    15,671.70x = 21,998.70 × 15,671.70
  4. Step 4: Simplify right side
    15,671.70x = 344,757,026.79
  5. Step 5: Solve for x
    x = 344,757,026.79/15,671.70
  6. Step 6: Final answer
    x = 21,998.70

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Half scale
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Double scale
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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.