Home / 20,907.90-31,362.03-5,325.51

Finding the Fourth Proportional to 20,907.90, 31,362.03 and 5,325.51

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Solution

The fourth proportional to 20,907.90, 31,362.03 and 5,325.51 is: 7,988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.90 : 31,362.03 = 5,325.51 : x
  2. Step 2: Convert to fraction form
    20,907.90/31,362.03 = 5,325.51/x
  3. Step 3: Cross multiply
    20,907.90x = 31,362.03 × 5,325.51
  4. Step 4: Simplify right side
    20,907.90x = 167,018,804.39
  5. Step 5: Solve for x
    x = 167,018,804.39/20,907.90
  6. Step 6: Final answer
    x = 7,988.31

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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.