Home / 20,745-31,117.50-6,716.79

Finding the Fourth Proportional to 20,745, 31,117.50 and 6,716.79

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Solution

The fourth proportional to 20,745, 31,117.50 and 6,716.79 is: 10,075.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745 : 31,117.50 = 6,716.79 : x
  2. Step 2: Convert to fraction form
    20,745/31,117.50 = 6,716.79/x
  3. Step 3: Cross multiply
    20,745x = 31,117.50 × 6,716.79
  4. Step 4: Simplify right side
    20,745x = 209,009,712.83
  5. Step 5: Solve for x
    x = 209,009,712.83/20,745
  6. Step 6: Final answer
    x = 10,075.19

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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.