Home / 20,990.02-28,966.26-11,558.62

Finding the Fourth Proportional to 20,990.02, 28,966.26 and 11,558.62

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Solution

The fourth proportional to 20,990.02, 28,966.26 and 11,558.62 is: 15,950.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.02 : 28,966.26 = 11,558.62 : x
  2. Step 2: Convert to fraction form
    20,990.02/28,966.26 = 11,558.62/x
  3. Step 3: Cross multiply
    20,990.02x = 28,966.26 × 11,558.62
  4. Step 4: Simplify right side
    20,990.02x = 334,809,992.16
  5. Step 5: Solve for x
    x = 334,809,992.16/20,990.02
  6. Step 6: Final answer
    x = 15,950.91

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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.