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Finding the Fourth Proportional to 39,372, 59,075.40 and 20,647.56

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Solution

The fourth proportional to 39,372, 59,075.40 and 20,647.56 is: 30,980.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,372 : 59,075.40 = 20,647.56 : x
  2. Step 2: Convert to fraction form
    39,372/59,075.40 = 20,647.56/x
  3. Step 3: Cross multiply
    39,372x = 59,075.40 × 20,647.56
  4. Step 4: Simplify right side
    39,372x = 1,219,762,866.02
  5. Step 5: Solve for x
    x = 1,219,762,866.02/39,372
  6. Step 6: Final answer
    x = 30,980.46

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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.