Home / 13,555.36-18,701.37-8,448.55

Finding the Fourth Proportional to 13,555.36, 18,701.37 and 8,448.55

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Solution

The fourth proportional to 13,555.36, 18,701.37 and 8,448.55 is: 11,655.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.36 : 18,701.37 = 8,448.55 : x
  2. Step 2: Convert to fraction form
    13,555.36/18,701.37 = 8,448.55/x
  3. Step 3: Cross multiply
    13,555.36x = 18,701.37 × 8,448.55
  4. Step 4: Simplify right side
    13,555.36x = 157,999,459.51
  5. Step 5: Solve for x
    x = 157,999,459.51/13,555.36
  6. Step 6: Final answer
    x = 11,655.87

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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.