Home / 21,051.65-31,621.20-16,699.52

Finding the Fourth Proportional to 21,051.65, 31,621.20 and 16,699.52

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Solution

The fourth proportional to 21,051.65, 31,621.20 and 16,699.52 is: 25,083.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.65 : 31,621.20 = 16,699.52 : x
  2. Step 2: Convert to fraction form
    21,051.65/31,621.20 = 16,699.52/x
  3. Step 3: Cross multiply
    21,051.65x = 31,621.20 × 16,699.52
  4. Step 4: Simplify right side
    21,051.65x = 528,058,703.72
  5. Step 5: Solve for x
    x = 528,058,703.72/21,051.65
  6. Step 6: Final answer
    x = 25,083.96

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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.