Home / 20,989.94-28,966.02-11,558.49

Finding the Fourth Proportional to 20,989.94, 28,966.02 and 11,558.49

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Solution

The fourth proportional to 20,989.94, 28,966.02 and 11,558.49 is: 15,950.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.94 : 28,966.02 = 11,558.49 : x
  2. Step 2: Convert to fraction form
    20,989.94/28,966.02 = 11,558.49/x
  3. Step 3: Cross multiply
    20,989.94x = 28,966.02 × 11,558.49
  4. Step 4: Simplify right side
    20,989.94x = 334,803,452.51
  5. Step 5: Solve for x
    x = 334,803,452.51/20,989.94
  6. Step 6: Final answer
    x = 15,950.67

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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.