Home / 18,916.40-28,379.20-8,528.16

Finding the Fourth Proportional to 18,916.40, 28,379.20 and 8,528.16

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Solution

The fourth proportional to 18,916.40, 28,379.20 and 8,528.16 is: 12,794.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.40 : 28,379.20 = 8,528.16 : x
  2. Step 2: Convert to fraction form
    18,916.40/28,379.20 = 8,528.16/x
  3. Step 3: Cross multiply
    18,916.40x = 28,379.20 × 8,528.16
  4. Step 4: Simplify right side
    18,916.40x = 242,022,358.27
  5. Step 5: Solve for x
    x = 242,022,358.27/18,916.40
  6. Step 6: Final answer
    x = 12,794.31

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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.