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Finding the Fourth Proportional to 30,385.66, 45,583.35 and 12,855.64

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Solution

The fourth proportional to 30,385.66, 45,583.35 and 12,855.64 is: 19,285.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,385.66 : 45,583.35 = 12,855.64 : x
  2. Step 2: Convert to fraction form
    30,385.66/45,583.35 = 12,855.64/x
  3. Step 3: Cross multiply
    30,385.66x = 45,583.35 × 12,855.64
  4. Step 4: Simplify right side
    30,385.66x = 586,003,085.00
  5. Step 5: Solve for x
    x = 586,003,085.00/30,385.66
  6. Step 6: Final answer
    x = 19,285.51

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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.