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Finding the Fourth Proportional to 18,962.70, 28,403.01 and 12,368.88

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Solution

The fourth proportional to 18,962.70, 28,403.01 and 12,368.88 is: 18,526.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.70 : 28,403.01 = 12,368.88 : x
  2. Step 2: Convert to fraction form
    18,962.70/28,403.01 = 12,368.88/x
  3. Step 3: Cross multiply
    18,962.70x = 28,403.01 × 12,368.88
  4. Step 4: Simplify right side
    18,962.70x = 351,313,422.33
  5. Step 5: Solve for x
    x = 351,313,422.33/18,962.70
  6. Step 6: Final answer
    x = 18,526.55

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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.