Home / 21,908.64-30,225.12-12,475.44

Finding the Fourth Proportional to 21,908.64, 30,225.12 and 12,475.44

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Solution

The fourth proportional to 21,908.64, 30,225.12 and 12,475.44 is: 17,211.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.64 : 30,225.12 = 12,475.44 : x
  2. Step 2: Convert to fraction form
    21,908.64/30,225.12 = 12,475.44/x
  3. Step 3: Cross multiply
    21,908.64x = 30,225.12 × 12,475.44
  4. Step 4: Simplify right side
    21,908.64x = 377,071,671.05
  5. Step 5: Solve for x
    x = 377,071,671.05/21,908.64
  6. Step 6: Final answer
    x = 17,211.09

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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.