Home / 20,870.79-31,309.47-6,827.51

Finding the Fourth Proportional to 20,870.79, 31,309.47 and 6,827.51

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Solution

The fourth proportional to 20,870.79, 31,309.47 and 6,827.51 is: 10,242.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.79 : 31,309.47 = 6,827.51 : x
  2. Step 2: Convert to fraction form
    20,870.79/31,309.47 = 6,827.51/x
  3. Step 3: Cross multiply
    20,870.79x = 31,309.47 × 6,827.51
  4. Step 4: Simplify right side
    20,870.79x = 213,765,797.79
  5. Step 5: Solve for x
    x = 213,765,797.79/20,870.79
  6. Step 6: Final answer
    x = 10,242.34

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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.