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Finding the Fourth Proportional to 18,911.41, 28,366.08 and 5,762.68

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Solution

The fourth proportional to 18,911.41, 28,366.08 and 5,762.68 is: 8,643.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.41 : 28,366.08 = 5,762.68 : x
  2. Step 2: Convert to fraction form
    18,911.41/28,366.08 = 5,762.68/x
  3. Step 3: Cross multiply
    18,911.41x = 28,366.08 × 5,762.68
  4. Step 4: Simplify right side
    18,911.41x = 163,464,641.89
  5. Step 5: Solve for x
    x = 163,464,641.89/18,911.41
  6. Step 6: Final answer
    x = 8,643.70

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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.