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Finding the Fourth Proportional to 18,810.60, 28,215.90 and 16,404.90

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Solution

The fourth proportional to 18,810.60, 28,215.90 and 16,404.90 is: 24,607.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.60 : 28,215.90 = 16,404.90 : x
  2. Step 2: Convert to fraction form
    18,810.60/28,215.90 = 16,404.90/x
  3. Step 3: Cross multiply
    18,810.60x = 28,215.90 × 16,404.90
  4. Step 4: Simplify right side
    18,810.60x = 462,879,017.91
  5. Step 5: Solve for x
    x = 462,879,017.91/18,810.60
  6. Step 6: Final answer
    x = 24,607.35

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Similar ratio
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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.