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Finding the Fourth Proportional to 28,624.68, 42,940.95 and 9,899.70

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Solution

The fourth proportional to 28,624.68, 42,940.95 and 9,899.70 is: 14,850.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,624.68 : 42,940.95 = 9,899.70 : x
  2. Step 2: Convert to fraction form
    28,624.68/42,940.95 = 9,899.70/x
  3. Step 3: Cross multiply
    28,624.68x = 42,940.95 × 9,899.70
  4. Step 4: Simplify right side
    28,624.68x = 425,102,522.72
  5. Step 5: Solve for x
    x = 425,102,522.72/28,624.68
  6. Step 6: Final answer
    x = 14,850.91

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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.