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Finding the Fourth Proportional to 19,424.78, 26,907.72 and 19,031.12

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Solution

The fourth proportional to 19,424.78, 26,907.72 and 19,031.12 is: 26,362.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,424.78 : 26,907.72 = 19,031.12 : x
  2. Step 2: Convert to fraction form
    19,424.78/26,907.72 = 19,031.12/x
  3. Step 3: Cross multiply
    19,424.78x = 26,907.72 × 19,031.12
  4. Step 4: Simplify right side
    19,424.78x = 512,084,048.25
  5. Step 5: Solve for x
    x = 512,084,048.25/19,424.78
  6. Step 6: Final answer
    x = 26,362.41

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.