Home / 9,315.12-13,972.80-2,740.80

Finding the Fourth Proportional to 9,315.12, 13,972.80 and 2,740.80

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Solution

The fourth proportional to 9,315.12, 13,972.80 and 2,740.80 is: 4,111.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.12 : 13,972.80 = 2,740.80 : x
  2. Step 2: Convert to fraction form
    9,315.12/13,972.80 = 2,740.80/x
  3. Step 3: Cross multiply
    9,315.12x = 13,972.80 × 2,740.80
  4. Step 4: Simplify right side
    9,315.12x = 38,296,650.24
  5. Step 5: Solve for x
    x = 38,296,650.24/9,315.12
  6. Step 6: Final answer
    x = 4,111.24

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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.