Home / 20,783.23-28,670.89-15,109.18

Finding the Fourth Proportional to 20,783.23, 28,670.89 and 15,109.18

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Solution

The fourth proportional to 20,783.23, 28,670.89 and 15,109.18 is: 20,843.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.23 : 28,670.89 = 15,109.18 : x
  2. Step 2: Convert to fraction form
    20,783.23/28,670.89 = 15,109.18/x
  3. Step 3: Cross multiply
    20,783.23x = 28,670.89 × 15,109.18
  4. Step 4: Simplify right side
    20,783.23x = 433,193,637.77
  5. Step 5: Solve for x
    x = 433,193,637.77/20,783.23
  6. Step 6: Final answer
    x = 20,843.42

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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.