Home / 7,678.68-11,515.20-2,746.98

Finding the Fourth Proportional to 7,678.68, 11,515.20 and 2,746.98

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Solution

The fourth proportional to 7,678.68, 11,515.20 and 2,746.98 is: 4,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.68 : 11,515.20 = 2,746.98 : x
  2. Step 2: Convert to fraction form
    7,678.68/11,515.20 = 2,746.98/x
  3. Step 3: Cross multiply
    7,678.68x = 11,515.20 × 2,746.98
  4. Step 4: Simplify right side
    7,678.68x = 31,632,024.10
  5. Step 5: Solve for x
    x = 31,632,024.10/7,678.68
  6. Step 6: Final answer
    x = 4,119.46

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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.