Home / 21,021.66-31,545.72-19,051.20

Finding the Fourth Proportional to 21,021.66, 31,545.72 and 19,051.20

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Solution

The fourth proportional to 21,021.66, 31,545.72 and 19,051.20 is: 28,588.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.66 : 31,545.72 = 19,051.20 : x
  2. Step 2: Convert to fraction form
    21,021.66/31,545.72 = 19,051.20/x
  3. Step 3: Cross multiply
    21,021.66x = 31,545.72 × 19,051.20
  4. Step 4: Simplify right side
    21,021.66x = 600,983,820.86
  5. Step 5: Solve for x
    x = 600,983,820.86/21,021.66
  6. Step 6: Final answer
    x = 28,588.79

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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.