Home / 13,478.40-18,516.60-11,113.20

Finding the Fourth Proportional to 13,478.40, 18,516.60 and 11,113.20

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Solution

The fourth proportional to 13,478.40, 18,516.60 and 11,113.20 is: 15,267.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.40 : 18,516.60 = 11,113.20 : x
  2. Step 2: Convert to fraction form
    13,478.40/18,516.60 = 11,113.20/x
  3. Step 3: Cross multiply
    13,478.40x = 18,516.60 × 11,113.20
  4. Step 4: Simplify right side
    13,478.40x = 205,778,679.12
  5. Step 5: Solve for x
    x = 205,778,679.12/13,478.40
  6. Step 6: Final answer
    x = 15,267.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.