Home / 13,430.50-20,145.75-5,222.50

Finding the Fourth Proportional to 13,430.50, 20,145.75 and 5,222.50

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Solution

The fourth proportional to 13,430.50, 20,145.75 and 5,222.50 is: 7,833.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.50 : 20,145.75 = 5,222.50 : x
  2. Step 2: Convert to fraction form
    13,430.50/20,145.75 = 5,222.50/x
  3. Step 3: Cross multiply
    13,430.50x = 20,145.75 × 5,222.50
  4. Step 4: Simplify right side
    13,430.50x = 105,211,179.38
  5. Step 5: Solve for x
    x = 105,211,179.38/13,430.50
  6. Step 6: Final answer
    x = 7,833.75

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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.