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Finding the Fourth Proportional to 28,764.04, 39,686.64 and 16,830.32

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Solution

The fourth proportional to 28,764.04, 39,686.64 and 16,830.32 is: 23,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,764.04 : 39,686.64 = 16,830.32 : x
  2. Step 2: Convert to fraction form
    28,764.04/39,686.64 = 16,830.32/x
  3. Step 3: Cross multiply
    28,764.04x = 39,686.64 × 16,830.32
  4. Step 4: Simplify right side
    28,764.04x = 667,938,850.92
  5. Step 5: Solve for x
    x = 667,938,850.92/28,764.04
  6. Step 6: Final answer
    x = 23,221.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.