Home / 20,989.40-28,965.74-11,557.94

Finding the Fourth Proportional to 20,989.40, 28,965.74 and 11,557.94

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Solution

The fourth proportional to 20,989.40, 28,965.74 and 11,557.94 is: 15,950.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.40 : 28,965.74 = 11,557.94 : x
  2. Step 2: Convert to fraction form
    20,989.40/28,965.74 = 11,557.94/x
  3. Step 3: Cross multiply
    20,989.40x = 28,965.74 × 11,557.94
  4. Step 4: Simplify right side
    20,989.40x = 334,784,082.36
  5. Step 5: Solve for x
    x = 334,784,082.36/20,989.40
  6. Step 6: Final answer
    x = 15,950.15

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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.