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Finding the Fourth Proportional to 18,723.86, 27,915.42 and 16,620.22

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Solution

The fourth proportional to 18,723.86, 27,915.42 and 16,620.22 is: 24,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.86 : 27,915.42 = 16,620.22 : x
  2. Step 2: Convert to fraction form
    18,723.86/27,915.42 = 16,620.22/x
  3. Step 3: Cross multiply
    18,723.86x = 27,915.42 × 16,620.22
  4. Step 4: Simplify right side
    18,723.86x = 463,960,421.79
  5. Step 5: Solve for x
    x = 463,960,421.79/18,723.86
  6. Step 6: Final answer
    x = 24,779.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.