Home / 13,135.64-18,120.43-8,886.89

Finding the Fourth Proportional to 13,135.64, 18,120.43 and 8,886.89

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Solution

The fourth proportional to 13,135.64, 18,120.43 and 8,886.89 is: 12,259.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.64 : 18,120.43 = 8,886.89 : x
  2. Step 2: Convert to fraction form
    13,135.64/18,120.43 = 8,886.89/x
  3. Step 3: Cross multiply
    13,135.64x = 18,120.43 × 8,886.89
  4. Step 4: Simplify right side
    13,135.64x = 161,034,268.16
  5. Step 5: Solve for x
    x = 161,034,268.16/13,135.64
  6. Step 6: Final answer
    x = 12,259.34

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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.