Home / 20,647.48-28,492.70-11,215.80

Finding the Fourth Proportional to 20,647.48, 28,492.70 and 11,215.80

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Solution

The fourth proportional to 20,647.48, 28,492.70 and 11,215.80 is: 15,477.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.48 : 28,492.70 = 11,215.80 : x
  2. Step 2: Convert to fraction form
    20,647.48/28,492.70 = 11,215.80/x
  3. Step 3: Cross multiply
    20,647.48x = 28,492.70 × 11,215.80
  4. Step 4: Simplify right side
    20,647.48x = 319,568,424.66
  5. Step 5: Solve for x
    x = 319,568,424.66/20,647.48
  6. Step 6: Final answer
    x = 15,477.36

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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.