Home / 13,585.85-18,749.70-7,920.16

Finding the Fourth Proportional to 13,585.85, 18,749.70 and 7,920.16

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Solution

The fourth proportional to 13,585.85, 18,749.70 and 7,920.16 is: 10,930.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,585.85 : 18,749.70 = 7,920.16 : x
  2. Step 2: Convert to fraction form
    13,585.85/18,749.70 = 7,920.16/x
  3. Step 3: Cross multiply
    13,585.85x = 18,749.70 × 7,920.16
  4. Step 4: Simplify right side
    13,585.85x = 148,500,623.95
  5. Step 5: Solve for x
    x = 148,500,623.95/13,585.85
  6. Step 6: Final answer
    x = 10,930.54

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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.