Home / 7,921.50-10,931.67-4,609.50

Finding the Fourth Proportional to 7,921.50, 10,931.67 and 4,609.50

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Solution

The fourth proportional to 7,921.50, 10,931.67 and 4,609.50 is: 6,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.50 : 10,931.67 = 4,609.50 : x
  2. Step 2: Convert to fraction form
    7,921.50/10,931.67 = 4,609.50/x
  3. Step 3: Cross multiply
    7,921.50x = 10,931.67 × 4,609.50
  4. Step 4: Simplify right side
    7,921.50x = 50,389,532.87
  5. Step 5: Solve for x
    x = 50,389,532.87/7,921.50
  6. Step 6: Final answer
    x = 6,361.11

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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.