Home / 39,405.20-59,075.40-20,937.20

Finding the Fourth Proportional to 39,405.20, 59,075.40 and 20,937.20

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Solution

The fourth proportional to 39,405.20, 59,075.40 and 20,937.20 is: 31,388.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.20 : 59,075.40 = 20,937.20 : x
  2. Step 2: Convert to fraction form
    39,405.20/59,075.40 = 20,937.20/x
  3. Step 3: Cross multiply
    39,405.20x = 59,075.40 × 20,937.20
  4. Step 4: Simplify right side
    39,405.20x = 1,236,873,464.88
  5. Step 5: Solve for x
    x = 1,236,873,464.88/39,405.20
  6. Step 6: Final answer
    x = 31,388.58

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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.