Home / 39,900.36-59,860.80-21,168.72

Finding the Fourth Proportional to 39,900.36, 59,860.80 and 21,168.72

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Solution

The fourth proportional to 39,900.36, 59,860.80 and 21,168.72 is: 31,758.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.36 : 59,860.80 = 21,168.72 : x
  2. Step 2: Convert to fraction form
    39,900.36/59,860.80 = 21,168.72/x
  3. Step 3: Cross multiply
    39,900.36x = 59,860.80 × 21,168.72
  4. Step 4: Simplify right side
    39,900.36x = 1,267,176,514.18
  5. Step 5: Solve for x
    x = 1,267,176,514.18/39,900.36
  6. Step 6: Final answer
    x = 31,758.52

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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.