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Finding the Fourth Proportional to 19,305.93, 28,928.90 and 9,299.90

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Solution

The fourth proportional to 19,305.93, 28,928.90 and 9,299.90 is: 13,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.93 : 28,928.90 = 9,299.90 : x
  2. Step 2: Convert to fraction form
    19,305.93/28,928.90 = 9,299.90/x
  3. Step 3: Cross multiply
    19,305.93x = 28,928.90 × 9,299.90
  4. Step 4: Simplify right side
    19,305.93x = 269,035,829.32
  5. Step 5: Solve for x
    x = 269,035,829.32/19,305.93
  6. Step 6: Final answer
    x = 13,935.40

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1.5x scale

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.