Home / 7,113.55-9,816.69-3,969.74

Finding the Fourth Proportional to 7,113.55, 9,816.69 and 3,969.74

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Solution

The fourth proportional to 7,113.55, 9,816.69 and 3,969.74 is: 5,478.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.55 : 9,816.69 = 3,969.74 : x
  2. Step 2: Convert to fraction form
    7,113.55/9,816.69 = 3,969.74/x
  3. Step 3: Cross multiply
    7,113.55x = 9,816.69 × 3,969.74
  4. Step 4: Simplify right side
    7,113.55x = 38,969,642.99
  5. Step 5: Solve for x
    x = 38,969,642.99/7,113.55
  6. Step 6: Final answer
    x = 5,478.23

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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.