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Finding the Fourth Proportional to 18,485.31, 25,509.81 and 10,101.81

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Solution

The fourth proportional to 18,485.31, 25,509.81 and 10,101.81 is: 13,940.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,485.31 : 25,509.81 = 10,101.81 : x
  2. Step 2: Convert to fraction form
    18,485.31/25,509.81 = 10,101.81/x
  3. Step 3: Cross multiply
    18,485.31x = 25,509.81 × 10,101.81
  4. Step 4: Simplify right side
    18,485.31x = 257,695,253.76
  5. Step 5: Solve for x
    x = 257,695,253.76/18,485.31
  6. Step 6: Final answer
    x = 13,940.54

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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.