Home / 20,521.36-28,317.77-11,571.06

Finding the Fourth Proportional to 20,521.36, 28,317.77 and 11,571.06

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Solution

The fourth proportional to 20,521.36, 28,317.77 and 11,571.06 is: 15,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.36 : 28,317.77 = 11,571.06 : x
  2. Step 2: Convert to fraction form
    20,521.36/28,317.77 = 11,571.06/x
  3. Step 3: Cross multiply
    20,521.36x = 28,317.77 × 11,571.06
  4. Step 4: Simplify right side
    20,521.36x = 327,666,615.74
  5. Step 5: Solve for x
    x = 327,666,615.74/20,521.36
  6. Step 6: Final answer
    x = 15,967.10

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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.