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Finding the Fourth Proportional to 18,807.89, 25,955.18 and 11,254.54

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Solution

The fourth proportional to 18,807.89, 25,955.18 and 11,254.54 is: 15,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.89 : 25,955.18 = 11,254.54 : x
  2. Step 2: Convert to fraction form
    18,807.89/25,955.18 = 11,254.54/x
  3. Step 3: Cross multiply
    18,807.89x = 25,955.18 × 11,254.54
  4. Step 4: Simplify right side
    18,807.89x = 292,113,574.77
  5. Step 5: Solve for x
    x = 292,113,574.77/18,807.89
  6. Step 6: Final answer
    x = 15,531.44

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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.