Home / 21,055.22-31,578.48-7,907.30

Finding the Fourth Proportional to 21,055.22, 31,578.48 and 7,907.30

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Solution

The fourth proportional to 21,055.22, 31,578.48 and 7,907.30 is: 11,859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.22 : 31,578.48 = 7,907.30 : x
  2. Step 2: Convert to fraction form
    21,055.22/31,578.48 = 7,907.30/x
  3. Step 3: Cross multiply
    21,055.22x = 31,578.48 × 7,907.30
  4. Step 4: Simplify right side
    21,055.22x = 249,700,514.90
  5. Step 5: Solve for x
    x = 249,700,514.90/21,055.22
  6. Step 6: Final answer
    x = 11,859.32

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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.