Home / 13,519.51-18,669.75-12,783.22

Finding the Fourth Proportional to 13,519.51, 18,669.75 and 12,783.22

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Solution

The fourth proportional to 13,519.51, 18,669.75 and 12,783.22 is: 17,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.51 : 18,669.75 = 12,783.22 : x
  2. Step 2: Convert to fraction form
    13,519.51/18,669.75 = 12,783.22/x
  3. Step 3: Cross multiply
    13,519.51x = 18,669.75 × 12,783.22
  4. Step 4: Simplify right side
    13,519.51x = 238,659,521.60
  5. Step 5: Solve for x
    x = 238,659,521.60/13,519.51
  6. Step 6: Final answer
    x = 17,652.97

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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.