Home / 7,139.84-10,709.76-3,675.20

Finding the Fourth Proportional to 7,139.84, 10,709.76 and 3,675.20

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Solution

The fourth proportional to 7,139.84, 10,709.76 and 3,675.20 is: 5,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.84 : 10,709.76 = 3,675.20 : x
  2. Step 2: Convert to fraction form
    7,139.84/10,709.76 = 3,675.20/x
  3. Step 3: Cross multiply
    7,139.84x = 10,709.76 × 3,675.20
  4. Step 4: Simplify right side
    7,139.84x = 39,360,509.95
  5. Step 5: Solve for x
    x = 39,360,509.95/7,139.84
  6. Step 6: Final answer
    x = 5,512.80

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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.