Home / 20,816.76-31,210.44-7,667.40

Finding the Fourth Proportional to 20,816.76, 31,210.44 and 7,667.40

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Solution

The fourth proportional to 20,816.76, 31,210.44 and 7,667.40 is: 11,495.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.76 : 31,210.44 = 7,667.40 : x
  2. Step 2: Convert to fraction form
    20,816.76/31,210.44 = 7,667.40/x
  3. Step 3: Cross multiply
    20,816.76x = 31,210.44 × 7,667.40
  4. Step 4: Simplify right side
    20,816.76x = 239,302,927.66
  5. Step 5: Solve for x
    x = 239,302,927.66/20,816.76
  6. Step 6: Final answer
    x = 11,495.69

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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.