Home / 21,106.78-31,644.68-10,000.46

Finding the Fourth Proportional to 21,106.78, 31,644.68 and 10,000.46

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Solution

The fourth proportional to 21,106.78, 31,644.68 and 10,000.46 is: 14,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.78 : 31,644.68 = 10,000.46 : x
  2. Step 2: Convert to fraction form
    21,106.78/31,644.68 = 10,000.46/x
  3. Step 3: Cross multiply
    21,106.78x = 31,644.68 × 10,000.46
  4. Step 4: Simplify right side
    21,106.78x = 316,461,385.66
  5. Step 5: Solve for x
    x = 316,461,385.66/21,106.78
  6. Step 6: Final answer
    x = 14,993.35

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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.