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Finding the Fourth Proportional to 19,389.60, 27,223.20 and 19,389.60

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Solution

The fourth proportional to 19,389.60, 27,223.20 and 19,389.60 is: 27,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,389.60 : 27,223.20 = 19,389.60 : x
  2. Step 2: Convert to fraction form
    19,389.60/27,223.20 = 19,389.60/x
  3. Step 3: Cross multiply
    19,389.60x = 27,223.20 × 19,389.60
  4. Step 4: Simplify right side
    19,389.60x = 527,846,958.72
  5. Step 5: Solve for x
    x = 527,846,958.72/19,389.60
  6. Step 6: Final answer
    x = 27,223.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.