Home / 7,254.36-10,880.69-1,989.90

Finding the Fourth Proportional to 7,254.36, 10,880.69 and 1,989.90

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Solution

The fourth proportional to 7,254.36, 10,880.69 and 1,989.90 is: 2,984.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,254.36 : 10,880.69 = 1,989.90 : x
  2. Step 2: Convert to fraction form
    7,254.36/10,880.69 = 1,989.90/x
  3. Step 3: Cross multiply
    7,254.36x = 10,880.69 × 1,989.90
  4. Step 4: Simplify right side
    7,254.36x = 21,651,521.81
  5. Step 5: Solve for x
    x = 21,651,521.81/7,254.36
  6. Step 6: Final answer
    x = 2,984.62

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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.