Home / 13,490.32-20,221.62-5,168.40

Finding the Fourth Proportional to 13,490.32, 20,221.62 and 5,168.40

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Solution

The fourth proportional to 13,490.32, 20,221.62 and 5,168.40 is: 7,747.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.32 : 20,221.62 = 5,168.40 : x
  2. Step 2: Convert to fraction form
    13,490.32/20,221.62 = 5,168.40/x
  3. Step 3: Cross multiply
    13,490.32x = 20,221.62 × 5,168.40
  4. Step 4: Simplify right side
    13,490.32x = 104,513,420.81
  5. Step 5: Solve for x
    x = 104,513,420.81/13,490.32
  6. Step 6: Final answer
    x = 7,747.29

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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.