Home / 13,749.23-18,974.22-7,780.90

Finding the Fourth Proportional to 13,749.23, 18,974.22 and 7,780.90

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Solution

The fourth proportional to 13,749.23, 18,974.22 and 7,780.90 is: 10,737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.23 : 18,974.22 = 7,780.90 : x
  2. Step 2: Convert to fraction form
    13,749.23/18,974.22 = 7,780.90/x
  3. Step 3: Cross multiply
    13,749.23x = 18,974.22 × 7,780.90
  4. Step 4: Simplify right side
    13,749.23x = 147,636,506.33
  5. Step 5: Solve for x
    x = 147,636,506.33/13,749.23
  6. Step 6: Final answer
    x = 10,737.80

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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.