Home / 20,907.21-31,358.49-6,116.25

Finding the Fourth Proportional to 20,907.21, 31,358.49 and 6,116.25

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Solution

The fourth proportional to 20,907.21, 31,358.49 and 6,116.25 is: 9,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.21 : 31,358.49 = 6,116.25 : x
  2. Step 2: Convert to fraction form
    20,907.21/31,358.49 = 6,116.25/x
  3. Step 3: Cross multiply
    20,907.21x = 31,358.49 × 6,116.25
  4. Step 4: Simplify right side
    20,907.21x = 191,796,364.46
  5. Step 5: Solve for x
    x = 191,796,364.46/20,907.21
  6. Step 6: Final answer
    x = 9,173.69

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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.