Home / 18,928.08-28,318.31-12,658.28

Finding the Fourth Proportional to 18,928.08, 28,318.31 and 12,658.28

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Solution

The fourth proportional to 18,928.08, 28,318.31 and 12,658.28 is: 18,938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.08 : 28,318.31 = 12,658.28 : x
  2. Step 2: Convert to fraction form
    18,928.08/28,318.31 = 12,658.28/x
  3. Step 3: Cross multiply
    18,928.08x = 28,318.31 × 12,658.28
  4. Step 4: Simplify right side
    18,928.08x = 358,460,939.69
  5. Step 5: Solve for x
    x = 358,460,939.69/18,928.08
  6. Step 6: Final answer
    x = 18,938.05

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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.