Home / 13,484.65-20,299.78-12,128.35

Finding the Fourth Proportional to 13,484.65, 20,299.78 and 12,128.35

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Solution

The fourth proportional to 13,484.65, 20,299.78 and 12,128.35 is: 18,258.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,484.65 : 20,299.78 = 12,128.35 : x
  2. Step 2: Convert to fraction form
    13,484.65/20,299.78 = 12,128.35/x
  3. Step 3: Cross multiply
    13,484.65x = 20,299.78 × 12,128.35
  4. Step 4: Simplify right side
    13,484.65x = 246,202,836.76
  5. Step 5: Solve for x
    x = 246,202,836.76/13,484.65
  6. Step 6: Final answer
    x = 18,258.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.