Home / 18,985.42-26,201.31-10,921.54

Finding the Fourth Proportional to 18,985.42, 26,201.31 and 10,921.54

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Solution

The fourth proportional to 18,985.42, 26,201.31 and 10,921.54 is: 15,072.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.42 : 26,201.31 = 10,921.54 : x
  2. Step 2: Convert to fraction form
    18,985.42/26,201.31 = 10,921.54/x
  3. Step 3: Cross multiply
    18,985.42x = 26,201.31 × 10,921.54
  4. Step 4: Simplify right side
    18,985.42x = 286,158,655.22
  5. Step 5: Solve for x
    x = 286,158,655.22/18,985.42
  6. Step 6: Final answer
    x = 15,072.55

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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.