Home / 21,013.71-28,999.53-11,582.88

Finding the Fourth Proportional to 21,013.71, 28,999.53 and 11,582.88

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Solution

The fourth proportional to 21,013.71, 28,999.53 and 11,582.88 is: 15,984.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.71 : 28,999.53 = 11,582.88 : x
  2. Step 2: Convert to fraction form
    21,013.71/28,999.53 = 11,582.88/x
  3. Step 3: Cross multiply
    21,013.71x = 28,999.53 × 11,582.88
  4. Step 4: Simplify right side
    21,013.71x = 335,898,076.05
  5. Step 5: Solve for x
    x = 335,898,076.05/21,013.71
  6. Step 6: Final answer
    x = 15,984.71

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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.