Home / 7,911.81-11,868.53-2,985.60

Finding the Fourth Proportional to 7,911.81, 11,868.53 and 2,985.60

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Solution

The fourth proportional to 7,911.81, 11,868.53 and 2,985.60 is: 4,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.81 : 11,868.53 = 2,985.60 : x
  2. Step 2: Convert to fraction form
    7,911.81/11,868.53 = 2,985.60/x
  3. Step 3: Cross multiply
    7,911.81x = 11,868.53 × 2,985.60
  4. Step 4: Simplify right side
    7,911.81x = 35,434,683.17
  5. Step 5: Solve for x
    x = 35,434,683.17/7,911.81
  6. Step 6: Final answer
    x = 4,478.71

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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.