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Finding the Fourth Proportional to 28,123.56, 42,185.34 and 7,347.08

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Solution

The fourth proportional to 28,123.56, 42,185.34 and 7,347.08 is: 11,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.56 : 42,185.34 = 7,347.08 : x
  2. Step 2: Convert to fraction form
    28,123.56/42,185.34 = 7,347.08/x
  3. Step 3: Cross multiply
    28,123.56x = 42,185.34 × 7,347.08
  4. Step 4: Simplify right side
    28,123.56x = 309,939,067.81
  5. Step 5: Solve for x
    x = 309,939,067.81/28,123.56
  6. Step 6: Final answer
    x = 11,020.62

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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.