Home / 7,990.28-11,985.58-2,653.46

Finding the Fourth Proportional to 7,990.28, 11,985.58 and 2,653.46

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Solution

The fourth proportional to 7,990.28, 11,985.58 and 2,653.46 is: 3,980.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.28 : 11,985.58 = 2,653.46 : x
  2. Step 2: Convert to fraction form
    7,990.28/11,985.58 = 2,653.46/x
  3. Step 3: Cross multiply
    7,990.28x = 11,985.58 × 2,653.46
  4. Step 4: Simplify right side
    7,990.28x = 31,803,257.11
  5. Step 5: Solve for x
    x = 31,803,257.11/7,990.28
  6. Step 6: Final answer
    x = 3,980.24

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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.