Home / 7,920.48-11,868.40-2,987.42

Finding the Fourth Proportional to 7,920.48, 11,868.40 and 2,987.42

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Solution

The fourth proportional to 7,920.48, 11,868.40 and 2,987.42 is: 4,476.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.48 : 11,868.40 = 2,987.42 : x
  2. Step 2: Convert to fraction form
    7,920.48/11,868.40 = 2,987.42/x
  3. Step 3: Cross multiply
    7,920.48x = 11,868.40 × 2,987.42
  4. Step 4: Simplify right side
    7,920.48x = 35,455,880.59
  5. Step 5: Solve for x
    x = 35,455,880.59/7,920.48
  6. Step 6: Final answer
    x = 4,476.48

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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.