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Finding the Fourth Proportional to 28,672.40, 42,922.20 and 25,216.40

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Solution

The fourth proportional to 28,672.40, 42,922.20 and 25,216.40 is: 37,748.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.40 : 42,922.20 = 25,216.40 : x
  2. Step 2: Convert to fraction form
    28,672.40/42,922.20 = 25,216.40/x
  3. Step 3: Cross multiply
    28,672.40x = 42,922.20 × 25,216.40
  4. Step 4: Simplify right side
    28,672.40x = 1,082,343,364.08
  5. Step 5: Solve for x
    x = 1,082,343,364.08/28,672.40
  6. Step 6: Final answer
    x = 37,748.61

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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.