Home / 8,990.30-12,378.37-7,643.26

Finding the Fourth Proportional to 8,990.30, 12,378.37 and 7,643.26

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Solution

The fourth proportional to 8,990.30, 12,378.37 and 7,643.26 is: 10,523.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.30 : 12,378.37 = 7,643.26 : x
  2. Step 2: Convert to fraction form
    8,990.30/12,378.37 = 7,643.26/x
  3. Step 3: Cross multiply
    8,990.30x = 12,378.37 × 7,643.26
  4. Step 4: Simplify right side
    8,990.30x = 94,611,100.29
  5. Step 5: Solve for x
    x = 94,611,100.29/8,990.30
  6. Step 6: Final answer
    x = 10,523.69

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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.