Home / 21,060.86-31,582.51-8,572.43

Finding the Fourth Proportional to 21,060.86, 31,582.51 and 8,572.43

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Solution

The fourth proportional to 21,060.86, 31,582.51 and 8,572.43 is: 12,855.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.86 : 31,582.51 = 8,572.43 : x
  2. Step 2: Convert to fraction form
    21,060.86/31,582.51 = 8,572.43/x
  3. Step 3: Cross multiply
    21,060.86x = 31,582.51 × 8,572.43
  4. Step 4: Simplify right side
    21,060.86x = 270,738,913.72
  5. Step 5: Solve for x
    x = 270,738,913.72/21,060.86
  6. Step 6: Final answer
    x = 12,855.07

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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.