Home / 21,143.80-31,764.32-14,918.16

Finding the Fourth Proportional to 21,143.80, 31,764.32 and 14,918.16

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Solution

The fourth proportional to 21,143.80, 31,764.32 and 14,918.16 is: 22,411.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.80 : 31,764.32 = 14,918.16 : x
  2. Step 2: Convert to fraction form
    21,143.80/31,764.32 = 14,918.16/x
  3. Step 3: Cross multiply
    21,143.80x = 31,764.32 × 14,918.16
  4. Step 4: Simplify right side
    21,143.80x = 473,865,208.05
  5. Step 5: Solve for x
    x = 473,865,208.05/21,143.80
  6. Step 6: Final answer
    x = 22,411.54

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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.