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Finding the Fourth Proportional to 28,785.80, 39,723.06 and 19,352.84

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Solution

The fourth proportional to 28,785.80, 39,723.06 and 19,352.84 is: 26,706.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,785.80 : 39,723.06 = 19,352.84 : x
  2. Step 2: Convert to fraction form
    28,785.80/39,723.06 = 19,352.84/x
  3. Step 3: Cross multiply
    28,785.80x = 39,723.06 × 19,352.84
  4. Step 4: Simplify right side
    28,785.80x = 768,754,024.49
  5. Step 5: Solve for x
    x = 768,754,024.49/28,785.80
  6. Step 6: Final answer
    x = 26,706.02

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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.