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Finding the Fourth Proportional to 18,403, 25,399.02 and 10,955.32

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Solution

The fourth proportional to 18,403, 25,399.02 and 10,955.32 is: 15,120.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403 : 25,399.02 = 10,955.32 : x
  2. Step 2: Convert to fraction form
    18,403/25,399.02 = 10,955.32/x
  3. Step 3: Cross multiply
    18,403x = 25,399.02 × 10,955.32
  4. Step 4: Simplify right side
    18,403x = 278,254,391.79
  5. Step 5: Solve for x
    x = 278,254,391.79/18,403
  6. Step 6: Final answer
    x = 15,120.06

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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.