Home / 20,967.12-31,417.74-9,871.20

Finding the Fourth Proportional to 20,967.12, 31,417.74 and 9,871.20

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Solution

The fourth proportional to 20,967.12, 31,417.74 and 9,871.20 is: 14,791.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.12 : 31,417.74 = 9,871.20 : x
  2. Step 2: Convert to fraction form
    20,967.12/31,417.74 = 9,871.20/x
  3. Step 3: Cross multiply
    20,967.12x = 31,417.74 × 9,871.20
  4. Step 4: Simplify right side
    20,967.12x = 310,130,795.09
  5. Step 5: Solve for x
    x = 310,130,795.09/20,967.12
  6. Step 6: Final answer
    x = 14,791.29

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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.