Home / 7,111.99-9,813.36-4,278.70

Finding the Fourth Proportional to 7,111.99, 9,813.36 and 4,278.70

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Solution

The fourth proportional to 7,111.99, 9,813.36 and 4,278.70 is: 5,903.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.99 : 9,813.36 = 4,278.70 : x
  2. Step 2: Convert to fraction form
    7,111.99/9,813.36 = 4,278.70/x
  3. Step 3: Cross multiply
    7,111.99x = 9,813.36 × 4,278.70
  4. Step 4: Simplify right side
    7,111.99x = 41,988,423.43
  5. Step 5: Solve for x
    x = 41,988,423.43/7,111.99
  6. Step 6: Final answer
    x = 5,903.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.