Home / 13,430.78-20,147.10-3,569.84

Finding the Fourth Proportional to 13,430.78, 20,147.10 and 3,569.84

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Solution

The fourth proportional to 13,430.78, 20,147.10 and 3,569.84 is: 5,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.78 : 20,147.10 = 3,569.84 : x
  2. Step 2: Convert to fraction form
    13,430.78/20,147.10 = 3,569.84/x
  3. Step 3: Cross multiply
    13,430.78x = 20,147.10 × 3,569.84
  4. Step 4: Simplify right side
    13,430.78x = 71,921,923.46
  5. Step 5: Solve for x
    x = 71,921,923.46/13,430.78
  6. Step 6: Final answer
    x = 5,355.01

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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.