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Finding the Fourth Proportional to 15,110.70, 21,176.85 and 15,110.70

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Solution

The fourth proportional to 15,110.70, 21,176.85 and 15,110.70 is: 21,176.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,110.70 : 21,176.85 = 15,110.70 : x
  2. Step 2: Convert to fraction form
    15,110.70/21,176.85 = 15,110.70/x
  3. Step 3: Cross multiply
    15,110.70x = 21,176.85 × 15,110.70
  4. Step 4: Simplify right side
    15,110.70x = 319,997,027.30
  5. Step 5: Solve for x
    x = 319,997,027.30/15,110.70
  6. Step 6: Final answer
    x = 21,176.85

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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.