Home / 20,389.93-28,137.98-11,437.43

Finding the Fourth Proportional to 20,389.93, 28,137.98 and 11,437.43

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Solution

The fourth proportional to 20,389.93, 28,137.98 and 11,437.43 is: 15,783.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.93 : 28,137.98 = 11,437.43 : x
  2. Step 2: Convert to fraction form
    20,389.93/28,137.98 = 11,437.43/x
  3. Step 3: Cross multiply
    20,389.93x = 28,137.98 × 11,437.43
  4. Step 4: Simplify right side
    20,389.93x = 321,826,143.63
  5. Step 5: Solve for x
    x = 321,826,143.63/20,389.93
  6. Step 6: Final answer
    x = 15,783.58

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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.