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Finding the Fourth Proportional to 28,415.40, 42,623.10 and 25,650.60

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Solution

The fourth proportional to 28,415.40, 42,623.10 and 25,650.60 is: 38,475.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.40 : 42,623.10 = 25,650.60 : x
  2. Step 2: Convert to fraction form
    28,415.40/42,623.10 = 25,650.60/x
  3. Step 3: Cross multiply
    28,415.40x = 42,623.10 × 25,650.60
  4. Step 4: Simplify right side
    28,415.40x = 1,093,308,088.86
  5. Step 5: Solve for x
    x = 1,093,308,088.86/28,415.40
  6. Step 6: Final answer
    x = 38,475.90

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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.