Home / 21,003.64-28,983.89-13,045.73

Finding the Fourth Proportional to 21,003.64, 28,983.89 and 13,045.73

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Solution

The fourth proportional to 21,003.64, 28,983.89 and 13,045.73 is: 18,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.64 : 28,983.89 = 13,045.73 : x
  2. Step 2: Convert to fraction form
    21,003.64/28,983.89 = 13,045.73/x
  3. Step 3: Cross multiply
    21,003.64x = 28,983.89 × 13,045.73
  4. Step 4: Simplify right side
    21,003.64x = 378,115,890.98
  5. Step 5: Solve for x
    x = 378,115,890.98/21,003.64
  6. Step 6: Final answer
    x = 18,002.40

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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.