Home / 20,523.77-28,341.47-15,479.36

Finding the Fourth Proportional to 20,523.77, 28,341.47 and 15,479.36

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Solution

The fourth proportional to 20,523.77, 28,341.47 and 15,479.36 is: 21,375.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.77 : 28,341.47 = 15,479.36 : x
  2. Step 2: Convert to fraction form
    20,523.77/28,341.47 = 15,479.36/x
  3. Step 3: Cross multiply
    20,523.77x = 28,341.47 × 15,479.36
  4. Step 4: Simplify right side
    20,523.77x = 438,707,739.66
  5. Step 5: Solve for x
    x = 438,707,739.66/20,523.77
  6. Step 6: Final answer
    x = 21,375.59

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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.