Home / 20,384.06-28,130.31-11,885.95

Finding the Fourth Proportional to 20,384.06, 28,130.31 and 11,885.95

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Solution

The fourth proportional to 20,384.06, 28,130.31 and 11,885.95 is: 16,402.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.06 : 28,130.31 = 11,885.95 : x
  2. Step 2: Convert to fraction form
    20,384.06/28,130.31 = 11,885.95/x
  3. Step 3: Cross multiply
    20,384.06x = 28,130.31 × 11,885.95
  4. Step 4: Simplify right side
    20,384.06x = 334,355,458.14
  5. Step 5: Solve for x
    x = 334,355,458.14/20,384.06
  6. Step 6: Final answer
    x = 16,402.79

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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.