Home / 21,102.83-31,653.64-10,001.78

Finding the Fourth Proportional to 21,102.83, 31,653.64 and 10,001.78

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Solution

The fourth proportional to 21,102.83, 31,653.64 and 10,001.78 is: 15,002.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.83 : 31,653.64 = 10,001.78 : x
  2. Step 2: Convert to fraction form
    21,102.83/31,653.64 = 10,001.78/x
  3. Step 3: Cross multiply
    21,102.83x = 31,653.64 × 10,001.78
  4. Step 4: Simplify right side
    21,102.83x = 316,592,660.15
  5. Step 5: Solve for x
    x = 316,592,660.15/21,102.83
  6. Step 6: Final answer
    x = 15,002.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.