Home / 13,211.50-18,231.87-7,907.08

Finding the Fourth Proportional to 13,211.50, 18,231.87 and 7,907.08

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Solution

The fourth proportional to 13,211.50, 18,231.87 and 7,907.08 is: 10,911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.50 : 18,231.87 = 7,907.08 : x
  2. Step 2: Convert to fraction form
    13,211.50/18,231.87 = 7,907.08/x
  3. Step 3: Cross multiply
    13,211.50x = 18,231.87 × 7,907.08
  4. Step 4: Simplify right side
    13,211.50x = 144,160,854.64
  5. Step 5: Solve for x
    x = 144,160,854.64/13,211.50
  6. Step 6: Final answer
    x = 10,911.77

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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.