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Finding the Fourth Proportional to 18,937.08, 28,361.88 and 18,281

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Solution

The fourth proportional to 18,937.08, 28,361.88 and 18,281 is: 27,379.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.08 : 28,361.88 = 18,281 : x
  2. Step 2: Convert to fraction form
    18,937.08/28,361.88 = 18,281/x
  3. Step 3: Cross multiply
    18,937.08x = 28,361.88 × 18,281
  4. Step 4: Simplify right side
    18,937.08x = 518,483,528.28
  5. Step 5: Solve for x
    x = 518,483,528.28/18,937.08
  6. Step 6: Final answer
    x = 27,379.28

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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.