Home / 20,815.74-31,208.96-7,666.40

Finding the Fourth Proportional to 20,815.74, 31,208.96 and 7,666.40

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Solution

The fourth proportional to 20,815.74, 31,208.96 and 7,666.40 is: 11,494.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.74 : 31,208.96 = 7,666.40 : x
  2. Step 2: Convert to fraction form
    20,815.74/31,208.96 = 7,666.40/x
  3. Step 3: Cross multiply
    20,815.74x = 31,208.96 × 7,666.40
  4. Step 4: Simplify right side
    20,815.74x = 239,260,370.94
  5. Step 5: Solve for x
    x = 239,260,370.94/20,815.74
  6. Step 6: Final answer
    x = 11,494.20

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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.