Home / 21,013.65-28,998.96-11,582.21

Finding the Fourth Proportional to 21,013.65, 28,998.96 and 11,582.21

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Solution

The fourth proportional to 21,013.65, 28,998.96 and 11,582.21 is: 15,983.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.65 : 28,998.96 = 11,582.21 : x
  2. Step 2: Convert to fraction form
    21,013.65/28,998.96 = 11,582.21/x
  3. Step 3: Cross multiply
    21,013.65x = 28,998.96 × 11,582.21
  4. Step 4: Simplify right side
    21,013.65x = 335,872,044.50
  5. Step 5: Solve for x
    x = 335,872,044.50/21,013.65
  6. Step 6: Final answer
    x = 15,983.52

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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.