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Finding the Fourth Proportional to 15,104.70, 21,168.45 and 15,104.70

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Solution

The fourth proportional to 15,104.70, 21,168.45 and 15,104.70 is: 21,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,104.70 : 21,168.45 = 15,104.70 : x
  2. Step 2: Convert to fraction form
    15,104.70/21,168.45 = 15,104.70/x
  3. Step 3: Cross multiply
    15,104.70x = 21,168.45 × 15,104.70
  4. Step 4: Simplify right side
    15,104.70x = 319,743,086.72
  5. Step 5: Solve for x
    x = 319,743,086.72/15,104.70
  6. Step 6: Final answer
    x = 21,168.45

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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.