Home / 20,711.80-31,039.98-7,551.76

Finding the Fourth Proportional to 20,711.80, 31,039.98 and 7,551.76

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Solution

The fourth proportional to 20,711.80, 31,039.98 and 7,551.76 is: 11,317.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.80 : 31,039.98 = 7,551.76 : x
  2. Step 2: Convert to fraction form
    20,711.80/31,039.98 = 7,551.76/x
  3. Step 3: Cross multiply
    20,711.80x = 31,039.98 × 7,551.76
  4. Step 4: Simplify right side
    20,711.80x = 234,406,479.36
  5. Step 5: Solve for x
    x = 234,406,479.36/20,711.80
  6. Step 6: Final answer
    x = 11,317.53

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1.5x scale

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.