Home / 10,556.80-15,825.30-3,987.40

Finding the Fourth Proportional to 10,556.80, 15,825.30 and 3,987.40

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Solution

The fourth proportional to 10,556.80, 15,825.30 and 3,987.40 is: 5,977.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,556.80 : 15,825.30 = 3,987.40 : x
  2. Step 2: Convert to fraction form
    10,556.80/15,825.30 = 3,987.40/x
  3. Step 3: Cross multiply
    10,556.80x = 15,825.30 × 3,987.40
  4. Step 4: Simplify right side
    10,556.80x = 63,101,801.22
  5. Step 5: Solve for x
    x = 63,101,801.22/10,556.80
  6. Step 6: Final answer
    x = 5,977.36

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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.