Home / 20,804.84-31,207.80-7,648.64

Finding the Fourth Proportional to 20,804.84, 31,207.80 and 7,648.64

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Solution

The fourth proportional to 20,804.84, 31,207.80 and 7,648.64 is: 11,473.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.84 : 31,207.80 = 7,648.64 : x
  2. Step 2: Convert to fraction form
    20,804.84/31,207.80 = 7,648.64/x
  3. Step 3: Cross multiply
    20,804.84x = 31,207.80 × 7,648.64
  4. Step 4: Simplify right side
    20,804.84x = 238,697,227.39
  5. Step 5: Solve for x
    x = 238,697,227.39/20,804.84
  6. Step 6: Final answer
    x = 11,473.16

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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.