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Finding the Fourth Proportional to 28,305.64, 42,440.46 and 13,506.76

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Solution

The fourth proportional to 28,305.64, 42,440.46 and 13,506.76 is: 20,251.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.64 : 42,440.46 = 13,506.76 : x
  2. Step 2: Convert to fraction form
    28,305.64/42,440.46 = 13,506.76/x
  3. Step 3: Cross multiply
    28,305.64x = 42,440.46 × 13,506.76
  4. Step 4: Simplify right side
    28,305.64x = 573,233,107.51
  5. Step 5: Solve for x
    x = 573,233,107.51/28,305.64
  6. Step 6: Final answer
    x = 20,251.55

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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.