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Finding the Fourth Proportional to 25,279.64, 34,889 and 15,213.32

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Solution

The fourth proportional to 25,279.64, 34,889 and 15,213.32 is: 20,996.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,279.64 : 34,889 = 15,213.32 : x
  2. Step 2: Convert to fraction form
    25,279.64/34,889 = 15,213.32/x
  3. Step 3: Cross multiply
    25,279.64x = 34,889 × 15,213.32
  4. Step 4: Simplify right side
    25,279.64x = 530,777,521.48
  5. Step 5: Solve for x
    x = 530,777,521.48/25,279.64
  6. Step 6: Final answer
    x = 20,996.25

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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.