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Finding the Fourth Proportional to 18,890.01, 28,335.15 and 6,410.21

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Solution

The fourth proportional to 18,890.01, 28,335.15 and 6,410.21 is: 9,615.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.01 : 28,335.15 = 6,410.21 : x
  2. Step 2: Convert to fraction form
    18,890.01/28,335.15 = 6,410.21/x
  3. Step 3: Cross multiply
    18,890.01x = 28,335.15 × 6,410.21
  4. Step 4: Simplify right side
    18,890.01x = 181,634,120.21
  5. Step 5: Solve for x
    x = 181,634,120.21/18,890.01
  6. Step 6: Final answer
    x = 9,615.35

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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.