Home / 20,856.05-31,278.60-7,712.18

Finding the Fourth Proportional to 20,856.05, 31,278.60 and 7,712.18

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Solution

The fourth proportional to 20,856.05, 31,278.60 and 7,712.18 is: 11,566.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.05 : 31,278.60 = 7,712.18 : x
  2. Step 2: Convert to fraction form
    20,856.05/31,278.60 = 7,712.18/x
  3. Step 3: Cross multiply
    20,856.05x = 31,278.60 × 7,712.18
  4. Step 4: Simplify right side
    20,856.05x = 241,226,193.35
  5. Step 5: Solve for x
    x = 241,226,193.35/20,856.05
  6. Step 6: Final answer
    x = 11,566.25

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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.