Home / 6,987.85-9,643.08-4,005.45

Finding the Fourth Proportional to 6,987.85, 9,643.08 and 4,005.45

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Solution

The fourth proportional to 6,987.85, 9,643.08 and 4,005.45 is: 5,527.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.85 : 9,643.08 = 4,005.45 : x
  2. Step 2: Convert to fraction form
    6,987.85/9,643.08 = 4,005.45/x
  3. Step 3: Cross multiply
    6,987.85x = 9,643.08 × 4,005.45
  4. Step 4: Simplify right side
    6,987.85x = 38,624,826.57
  5. Step 5: Solve for x
    x = 38,624,826.57/6,987.85
  6. Step 6: Final answer
    x = 5,527.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.