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Finding the Fourth Proportional to 21,907.48, 32,889.48 and 18,807.42

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Solution

The fourth proportional to 21,907.48, 32,889.48 and 18,807.42 is: 28,235.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.48 : 32,889.48 = 18,807.42 : x
  2. Step 2: Convert to fraction form
    21,907.48/32,889.48 = 18,807.42/x
  3. Step 3: Cross multiply
    21,907.48x = 32,889.48 × 18,807.42
  4. Step 4: Simplify right side
    21,907.48x = 618,566,263.94
  5. Step 5: Solve for x
    x = 618,566,263.94/21,907.48
  6. Step 6: Final answer
    x = 28,235.39

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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.