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Finding the Fourth Proportional to 28,580.54, 42,843.15 and 12,776.63

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Solution

The fourth proportional to 28,580.54, 42,843.15 and 12,776.63 is: 19,152.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,580.54 : 42,843.15 = 12,776.63 : x
  2. Step 2: Convert to fraction form
    28,580.54/42,843.15 = 12,776.63/x
  3. Step 3: Cross multiply
    28,580.54x = 42,843.15 × 12,776.63
  4. Step 4: Simplify right side
    28,580.54x = 547,390,861.37
  5. Step 5: Solve for x
    x = 547,390,861.37/28,580.54
  6. Step 6: Final answer
    x = 19,152.58

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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.