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Finding the Fourth Proportional to 28,272.40, 42,408.60 and 26,659.60

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Solution

The fourth proportional to 28,272.40, 42,408.60 and 26,659.60 is: 39,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,272.40 : 42,408.60 = 26,659.60 : x
  2. Step 2: Convert to fraction form
    28,272.40/42,408.60 = 26,659.60/x
  3. Step 3: Cross multiply
    28,272.40x = 42,408.60 × 26,659.60
  4. Step 4: Simplify right side
    28,272.40x = 1,130,596,312.56
  5. Step 5: Solve for x
    x = 1,130,596,312.56/28,272.40
  6. Step 6: Final answer
    x = 39,989.40

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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.