Home / 21,014.96-28,999.50-11,582.78

Finding the Fourth Proportional to 21,014.96, 28,999.50 and 11,582.78

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Solution

The fourth proportional to 21,014.96, 28,999.50 and 11,582.78 is: 15,983.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.96 : 28,999.50 = 11,582.78 : x
  2. Step 2: Convert to fraction form
    21,014.96/28,999.50 = 11,582.78/x
  3. Step 3: Cross multiply
    21,014.96x = 28,999.50 × 11,582.78
  4. Step 4: Simplify right side
    21,014.96x = 335,894,828.61
  5. Step 5: Solve for x
    x = 335,894,828.61/21,014.96
  6. Step 6: Final answer
    x = 15,983.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.