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Finding the Fourth Proportional to 27,628.40, 41,345.40 and 18,880.40

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Solution

The fourth proportional to 27,628.40, 41,345.40 and 18,880.40 is: 28,254.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,628.40 : 41,345.40 = 18,880.40 : x
  2. Step 2: Convert to fraction form
    27,628.40/41,345.40 = 18,880.40/x
  3. Step 3: Cross multiply
    27,628.40x = 41,345.40 × 18,880.40
  4. Step 4: Simplify right side
    27,628.40x = 780,617,690.16
  5. Step 5: Solve for x
    x = 780,617,690.16/27,628.40
  6. Step 6: Final answer
    x = 28,254.18

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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.