Home / 21,013.80-28,998.90-11,582.34

Finding the Fourth Proportional to 21,013.80, 28,998.90 and 11,582.34

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Solution

The fourth proportional to 21,013.80, 28,998.90 and 11,582.34 is: 15,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.80 : 28,998.90 = 11,582.34 : x
  2. Step 2: Convert to fraction form
    21,013.80/28,998.90 = 11,582.34/x
  3. Step 3: Cross multiply
    21,013.80x = 28,998.90 × 11,582.34
  4. Step 4: Simplify right side
    21,013.80x = 335,875,119.43
  5. Step 5: Solve for x
    x = 335,875,119.43/21,013.80
  6. Step 6: Final answer
    x = 15,983.55

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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.