Home / 28,928.40-43,384-12,288.28

Finding the Fourth Proportional to 28,928.40, 43,384 and 12,288.28

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Solution

The fourth proportional to 28,928.40, 43,384 and 12,288.28 is: 18,428.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,928.40 : 43,384 = 12,288.28 : x
  2. Step 2: Convert to fraction form
    28,928.40/43,384 = 12,288.28/x
  3. Step 3: Cross multiply
    28,928.40x = 43,384 × 12,288.28
  4. Step 4: Simplify right side
    28,928.40x = 533,114,739.52
  5. Step 5: Solve for x
    x = 533,114,739.52/28,928.40
  6. Step 6: Final answer
    x = 18,428.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.