Home / 13,749.57-20,632.50-5,430.42

Finding the Fourth Proportional to 13,749.57, 20,632.50 and 5,430.42

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Solution

The fourth proportional to 13,749.57, 20,632.50 and 5,430.42 is: 8,148.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.57 : 20,632.50 = 5,430.42 : x
  2. Step 2: Convert to fraction form
    13,749.57/20,632.50 = 5,430.42/x
  3. Step 3: Cross multiply
    13,749.57x = 20,632.50 × 5,430.42
  4. Step 4: Simplify right side
    13,749.57x = 112,043,140.65
  5. Step 5: Solve for x
    x = 112,043,140.65/13,749.57
  6. Step 6: Final answer
    x = 8,148.85

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1.5x scale

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.