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Finding the Fourth Proportional to 19,289.64, 26,620.42 and 10,905.64

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Solution

The fourth proportional to 19,289.64, 26,620.42 and 10,905.64 is: 15,050.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,289.64 : 26,620.42 = 10,905.64 : x
  2. Step 2: Convert to fraction form
    19,289.64/26,620.42 = 10,905.64/x
  3. Step 3: Cross multiply
    19,289.64x = 26,620.42 × 10,905.64
  4. Step 4: Simplify right side
    19,289.64x = 290,312,717.17
  5. Step 5: Solve for x
    x = 290,312,717.17/19,289.64
  6. Step 6: Final answer
    x = 15,050.19

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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.