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Finding the Fourth Proportional to 28,715.90, 43,073.58 and 9,995.90

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Solution

The fourth proportional to 28,715.90, 43,073.58 and 9,995.90 is: 14,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.90 : 43,073.58 = 9,995.90 : x
  2. Step 2: Convert to fraction form
    28,715.90/43,073.58 = 9,995.90/x
  3. Step 3: Cross multiply
    28,715.90x = 43,073.58 × 9,995.90
  4. Step 4: Simplify right side
    28,715.90x = 430,559,198.32
  5. Step 5: Solve for x
    x = 430,559,198.32/28,715.90
  6. Step 6: Final answer
    x = 14,993.76

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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.