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Finding the Fourth Proportional to 28,576.60, 42,846.90 and 11,948.20

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Solution

The fourth proportional to 28,576.60, 42,846.90 and 11,948.20 is: 17,914.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.60 : 42,846.90 = 11,948.20 : x
  2. Step 2: Convert to fraction form
    28,576.60/42,846.90 = 11,948.20/x
  3. Step 3: Cross multiply
    28,576.60x = 42,846.90 × 11,948.20
  4. Step 4: Simplify right side
    28,576.60x = 511,943,330.58
  5. Step 5: Solve for x
    x = 511,943,330.58/28,576.60
  6. Step 6: Final answer
    x = 17,914.77

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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.