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Finding the Fourth Proportional to 28,420.40, 42,630.60 and 16,610.60

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Solution

The fourth proportional to 28,420.40, 42,630.60 and 16,610.60 is: 24,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.40 : 42,630.60 = 16,610.60 : x
  2. Step 2: Convert to fraction form
    28,420.40/42,630.60 = 16,610.60/x
  3. Step 3: Cross multiply
    28,420.40x = 42,630.60 × 16,610.60
  4. Step 4: Simplify right side
    28,420.40x = 708,119,844.36
  5. Step 5: Solve for x
    x = 708,119,844.36/28,420.40
  6. Step 6: Final answer
    x = 24,915.90

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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.