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Finding the Fourth Proportional to 28,406.40, 42,608.16 and 10,874.88

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Solution

The fourth proportional to 28,406.40, 42,608.16 and 10,874.88 is: 16,311.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.40 : 42,608.16 = 10,874.88 : x
  2. Step 2: Convert to fraction form
    28,406.40/42,608.16 = 10,874.88/x
  3. Step 3: Cross multiply
    28,406.40x = 42,608.16 × 10,874.88
  4. Step 4: Simplify right side
    28,406.40x = 463,358,627.02
  5. Step 5: Solve for x
    x = 463,358,627.02/28,406.40
  6. Step 6: Final answer
    x = 16,311.77

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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.