Home / 21,043.61-31,566.49-19,979.50

Finding the Fourth Proportional to 21,043.61, 31,566.49 and 19,979.50

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Solution

The fourth proportional to 21,043.61, 31,566.49 and 19,979.50 is: 29,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.61 : 31,566.49 = 19,979.50 : x
  2. Step 2: Convert to fraction form
    21,043.61/31,566.49 = 19,979.50/x
  3. Step 3: Cross multiply
    21,043.61x = 31,566.49 × 19,979.50
  4. Step 4: Simplify right side
    21,043.61x = 630,682,686.96
  5. Step 5: Solve for x
    x = 630,682,686.96/21,043.61
  6. Step 6: Final answer
    x = 29,970.27

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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.