Home / 21,208.04-31,814.28-7,169.72

Finding the Fourth Proportional to 21,208.04, 31,814.28 and 7,169.72

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Solution

The fourth proportional to 21,208.04, 31,814.28 and 7,169.72 is: 10,755.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.04 : 31,814.28 = 7,169.72 : x
  2. Step 2: Convert to fraction form
    21,208.04/31,814.28 = 7,169.72/x
  3. Step 3: Cross multiply
    21,208.04x = 31,814.28 × 7,169.72
  4. Step 4: Simplify right side
    21,208.04x = 228,099,479.60
  5. Step 5: Solve for x
    x = 228,099,479.60/21,208.04
  6. Step 6: Final answer
    x = 10,755.33

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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.