Home / 7,139.49-9,852.78-3,995.67

Finding the Fourth Proportional to 7,139.49, 9,852.78 and 3,995.67

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Solution

The fourth proportional to 7,139.49, 9,852.78 and 3,995.67 is: 5,514.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.49 : 9,852.78 = 3,995.67 : x
  2. Step 2: Convert to fraction form
    7,139.49/9,852.78 = 3,995.67/x
  3. Step 3: Cross multiply
    7,139.49x = 9,852.78 × 3,995.67
  4. Step 4: Simplify right side
    7,139.49x = 39,368,457.46
  5. Step 5: Solve for x
    x = 39,368,457.46/7,139.49
  6. Step 6: Final answer
    x = 5,514.18

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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.