Home / 9,120.18-13,680.54-2,880.24

Finding the Fourth Proportional to 9,120.18, 13,680.54 and 2,880.24

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Solution

The fourth proportional to 9,120.18, 13,680.54 and 2,880.24 is: 4,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.18 : 13,680.54 = 2,880.24 : x
  2. Step 2: Convert to fraction form
    9,120.18/13,680.54 = 2,880.24/x
  3. Step 3: Cross multiply
    9,120.18x = 13,680.54 × 2,880.24
  4. Step 4: Simplify right side
    9,120.18x = 39,403,238.53
  5. Step 5: Solve for x
    x = 39,403,238.53/9,120.18
  6. Step 6: Final answer
    x = 4,320.45

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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.