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Finding the Fourth Proportional to 17,938.20, 26,921.22 and 12,430.14

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Solution

The fourth proportional to 17,938.20, 26,921.22 and 12,430.14 is: 18,654.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,938.20 : 26,921.22 = 12,430.14 : x
  2. Step 2: Convert to fraction form
    17,938.20/26,921.22 = 12,430.14/x
  3. Step 3: Cross multiply
    17,938.20x = 26,921.22 × 12,430.14
  4. Step 4: Simplify right side
    17,938.20x = 334,634,533.57
  5. Step 5: Solve for x
    x = 334,634,533.57/17,938.20
  6. Step 6: Final answer
    x = 18,654.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.