Home / 13,120.90-18,106.31-7,152.44

Finding the Fourth Proportional to 13,120.90, 18,106.31 and 7,152.44

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Solution

The fourth proportional to 13,120.90, 18,106.31 and 7,152.44 is: 9,870.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.90 : 18,106.31 = 7,152.44 : x
  2. Step 2: Convert to fraction form
    13,120.90/18,106.31 = 7,152.44/x
  3. Step 3: Cross multiply
    13,120.90x = 18,106.31 × 7,152.44
  4. Step 4: Simplify right side
    13,120.90x = 129,504,295.90
  5. Step 5: Solve for x
    x = 129,504,295.90/13,120.90
  6. Step 6: Final answer
    x = 9,870.08

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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.