Home / 20,542.19-30,813.51-7,215.50

Finding the Fourth Proportional to 20,542.19, 30,813.51 and 7,215.50

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Solution

The fourth proportional to 20,542.19, 30,813.51 and 7,215.50 is: 10,823.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.19 : 30,813.51 = 7,215.50 : x
  2. Step 2: Convert to fraction form
    20,542.19/30,813.51 = 7,215.50/x
  3. Step 3: Cross multiply
    20,542.19x = 30,813.51 × 7,215.50
  4. Step 4: Simplify right side
    20,542.19x = 222,334,727.34
  5. Step 5: Solve for x
    x = 222,334,727.34/20,542.19
  6. Step 6: Final answer
    x = 10,823.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.