Home / 13,430.60-20,153.10-5,640.20

Finding the Fourth Proportional to 13,430.60, 20,153.10 and 5,640.20

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Solution

The fourth proportional to 13,430.60, 20,153.10 and 5,640.20 is: 8,463.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.60 : 20,153.10 = 5,640.20 : x
  2. Step 2: Convert to fraction form
    13,430.60/20,153.10 = 5,640.20/x
  3. Step 3: Cross multiply
    13,430.60x = 20,153.10 × 5,640.20
  4. Step 4: Simplify right side
    13,430.60x = 113,667,514.62
  5. Step 5: Solve for x
    x = 113,667,514.62/13,430.60
  6. Step 6: Final answer
    x = 8,463.32

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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.