Home / 9,315.21-13,973.78-2,987.88

Finding the Fourth Proportional to 9,315.21, 13,973.78 and 2,987.88

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Solution

The fourth proportional to 9,315.21, 13,973.78 and 2,987.88 is: 4,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.21 : 13,973.78 = 2,987.88 : x
  2. Step 2: Convert to fraction form
    9,315.21/13,973.78 = 2,987.88/x
  3. Step 3: Cross multiply
    9,315.21x = 13,973.78 × 2,987.88
  4. Step 4: Simplify right side
    9,315.21x = 41,751,977.79
  5. Step 5: Solve for x
    x = 41,751,977.79/9,315.21
  6. Step 6: Final answer
    x = 4,482.13

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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.