Home / 20,802.11-31,208.63-7,476.45

Finding the Fourth Proportional to 20,802.11, 31,208.63 and 7,476.45

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Solution

The fourth proportional to 20,802.11, 31,208.63 and 7,476.45 is: 11,216.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.11 : 31,208.63 = 7,476.45 : x
  2. Step 2: Convert to fraction form
    20,802.11/31,208.63 = 7,476.45/x
  3. Step 3: Cross multiply
    20,802.11x = 31,208.63 × 7,476.45
  4. Step 4: Simplify right side
    20,802.11x = 233,329,761.76
  5. Step 5: Solve for x
    x = 233,329,761.76/20,802.11
  6. Step 6: Final answer
    x = 11,216.64

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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.