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Finding the Fourth Proportional to 21,804.50, 32,705.07 and 12,415.04

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Solution

The fourth proportional to 21,804.50, 32,705.07 and 12,415.04 is: 18,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,804.50 : 32,705.07 = 12,415.04 : x
  2. Step 2: Convert to fraction form
    21,804.50/32,705.07 = 12,415.04/x
  3. Step 3: Cross multiply
    21,804.50x = 32,705.07 × 12,415.04
  4. Step 4: Simplify right side
    21,804.50x = 406,034,752.25
  5. Step 5: Solve for x
    x = 406,034,752.25/21,804.50
  6. Step 6: Final answer
    x = 18,621.60

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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.