Home / 13,440.64-20,160.90-5,118.70

Finding the Fourth Proportional to 13,440.64, 20,160.90 and 5,118.70

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Solution

The fourth proportional to 13,440.64, 20,160.90 and 5,118.70 is: 7,678.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.64 : 20,160.90 = 5,118.70 : x
  2. Step 2: Convert to fraction form
    13,440.64/20,160.90 = 5,118.70/x
  3. Step 3: Cross multiply
    13,440.64x = 20,160.90 × 5,118.70
  4. Step 4: Simplify right side
    13,440.64x = 103,197,598.83
  5. Step 5: Solve for x
    x = 103,197,598.83/13,440.64
  6. Step 6: Final answer
    x = 7,678.03

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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.