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Finding the Fourth Proportional to 18,899.68, 28,355.89 and 8,368.26

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Solution

The fourth proportional to 18,899.68, 28,355.89 and 8,368.26 is: 12,555.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.68 : 28,355.89 = 8,368.26 : x
  2. Step 2: Convert to fraction form
    18,899.68/28,355.89 = 8,368.26/x
  3. Step 3: Cross multiply
    18,899.68x = 28,355.89 × 8,368.26
  4. Step 4: Simplify right side
    18,899.68x = 237,289,417.34
  5. Step 5: Solve for x
    x = 237,289,417.34/18,899.68
  6. Step 6: Final answer
    x = 12,555.21

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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.