Home / 13,720.76-18,917.43-11,200.31

Finding the Fourth Proportional to 13,720.76, 18,917.43 and 11,200.31

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Solution

The fourth proportional to 13,720.76, 18,917.43 and 11,200.31 is: 15,442.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.76 : 18,917.43 = 11,200.31 : x
  2. Step 2: Convert to fraction form
    13,720.76/18,917.43 = 11,200.31/x
  3. Step 3: Cross multiply
    13,720.76x = 18,917.43 × 11,200.31
  4. Step 4: Simplify right side
    13,720.76x = 211,880,985.82
  5. Step 5: Solve for x
    x = 211,880,985.82/13,720.76
  6. Step 6: Final answer
    x = 15,442.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.