Home / 20,647.49-28,493.51-11,215.98

Finding the Fourth Proportional to 20,647.49, 28,493.51 and 11,215.98

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Solution

The fourth proportional to 20,647.49, 28,493.51 and 11,215.98 is: 15,478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.49 : 28,493.51 = 11,215.98 : x
  2. Step 2: Convert to fraction form
    20,647.49/28,493.51 = 11,215.98/x
  3. Step 3: Cross multiply
    20,647.49x = 28,493.51 × 11,215.98
  4. Step 4: Simplify right side
    20,647.49x = 319,582,582.21
  5. Step 5: Solve for x
    x = 319,582,582.21/20,647.49
  6. Step 6: Final answer
    x = 15,478.04

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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.