Home / 21,071.40-31,606.80-6,290.52

Finding the Fourth Proportional to 21,071.40, 31,606.80 and 6,290.52

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Solution

The fourth proportional to 21,071.40, 31,606.80 and 6,290.52 is: 9,435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.40 : 31,606.80 = 6,290.52 : x
  2. Step 2: Convert to fraction form
    21,071.40/31,606.80 = 6,290.52/x
  3. Step 3: Cross multiply
    21,071.40x = 31,606.80 × 6,290.52
  4. Step 4: Simplify right side
    21,071.40x = 198,823,207.54
  5. Step 5: Solve for x
    x = 198,823,207.54/21,071.40
  6. Step 6: Final answer
    x = 9,435.69

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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.