Home / 18,947.79-28,422.81-7,855.29

Finding the Fourth Proportional to 18,947.79, 28,422.81 and 7,855.29

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Solution

The fourth proportional to 18,947.79, 28,422.81 and 7,855.29 is: 11,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.79 : 28,422.81 = 7,855.29 : x
  2. Step 2: Convert to fraction form
    18,947.79/28,422.81 = 7,855.29/x
  3. Step 3: Cross multiply
    18,947.79x = 28,422.81 × 7,855.29
  4. Step 4: Simplify right side
    18,947.79x = 223,269,415.16
  5. Step 5: Solve for x
    x = 223,269,415.16/18,947.79
  6. Step 6: Final answer
    x = 11,783.40

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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.