Home / 21,000.76-31,512.12-19,790.62

Finding the Fourth Proportional to 21,000.76, 31,512.12 and 19,790.62

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Solution

The fourth proportional to 21,000.76, 31,512.12 and 19,790.62 is: 29,696.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.76 : 31,512.12 = 19,790.62 : x
  2. Step 2: Convert to fraction form
    21,000.76/31,512.12 = 19,790.62/x
  3. Step 3: Cross multiply
    21,000.76x = 31,512.12 × 19,790.62
  4. Step 4: Simplify right side
    21,000.76x = 623,644,392.31
  5. Step 5: Solve for x
    x = 623,644,392.31/21,000.76
  6. Step 6: Final answer
    x = 29,696.28

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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.