Home / 20,485.94-28,271.12-11,533.75

Finding the Fourth Proportional to 20,485.94, 28,271.12 and 11,533.75

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Solution

The fourth proportional to 20,485.94, 28,271.12 and 11,533.75 is: 15,916.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.94 : 28,271.12 = 11,533.75 : x
  2. Step 2: Convert to fraction form
    20,485.94/28,271.12 = 11,533.75/x
  3. Step 3: Cross multiply
    20,485.94x = 28,271.12 × 11,533.75
  4. Step 4: Simplify right side
    20,485.94x = 326,071,901.95
  5. Step 5: Solve for x
    x = 326,071,901.95/20,485.94
  6. Step 6: Final answer
    x = 15,916.87

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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.