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Finding the Fourth Proportional to 18,863.76, 26,030.88 and 10,905.42

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Solution

The fourth proportional to 18,863.76, 26,030.88 and 10,905.42 is: 15,048.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.76 : 26,030.88 = 10,905.42 : x
  2. Step 2: Convert to fraction form
    18,863.76/26,030.88 = 10,905.42/x
  3. Step 3: Cross multiply
    18,863.76x = 26,030.88 × 10,905.42
  4. Step 4: Simplify right side
    18,863.76x = 283,877,679.37
  5. Step 5: Solve for x
    x = 283,877,679.37/18,863.76
  6. Step 6: Final answer
    x = 15,048.84

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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.