Home / 13,712.64-20,468.64-11,777.28

Finding the Fourth Proportional to 13,712.64, 20,468.64 and 11,777.28

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Solution

The fourth proportional to 13,712.64, 20,468.64 and 11,777.28 is: 17,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.64 : 20,468.64 = 11,777.28 : x
  2. Step 2: Convert to fraction form
    13,712.64/20,468.64 = 11,777.28/x
  3. Step 3: Cross multiply
    13,712.64x = 20,468.64 × 11,777.28
  4. Step 4: Simplify right side
    13,712.64x = 241,064,904.50
  5. Step 5: Solve for x
    x = 241,064,904.50/13,712.64
  6. Step 6: Final answer
    x = 17,579.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.