Home / 13,407.40-20,111.10-4,172.20

Finding the Fourth Proportional to 13,407.40, 20,111.10 and 4,172.20

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Solution

The fourth proportional to 13,407.40, 20,111.10 and 4,172.20 is: 6,258.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407.40 : 20,111.10 = 4,172.20 : x
  2. Step 2: Convert to fraction form
    13,407.40/20,111.10 = 4,172.20/x
  3. Step 3: Cross multiply
    13,407.40x = 20,111.10 × 4,172.20
  4. Step 4: Simplify right side
    13,407.40x = 83,907,531.42
  5. Step 5: Solve for x
    x = 83,907,531.42/13,407.40
  6. Step 6: Final answer
    x = 6,258.30

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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.