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Finding the Fourth Proportional to 28,671.84, 43,012.80 and 13,091.04

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Solution

The fourth proportional to 28,671.84, 43,012.80 and 13,091.04 is: 19,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,671.84 : 43,012.80 = 13,091.04 : x
  2. Step 2: Convert to fraction form
    28,671.84/43,012.80 = 13,091.04/x
  3. Step 3: Cross multiply
    28,671.84x = 43,012.80 × 13,091.04
  4. Step 4: Simplify right side
    28,671.84x = 563,082,285.31
  5. Step 5: Solve for x
    x = 563,082,285.31/28,671.84
  6. Step 6: Final answer
    x = 19,638.86

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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.