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Finding the Fourth Proportional to 19,147.17, 28,703.70 and 7,457.70

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Solution

The fourth proportional to 19,147.17, 28,703.70 and 7,457.70 is: 11,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,147.17 : 28,703.70 = 7,457.70 : x
  2. Step 2: Convert to fraction form
    19,147.17/28,703.70 = 7,457.70/x
  3. Step 3: Cross multiply
    19,147.17x = 28,703.70 × 7,457.70
  4. Step 4: Simplify right side
    19,147.17x = 214,063,583.49
  5. Step 5: Solve for x
    x = 214,063,583.49/19,147.17
  6. Step 6: Final answer
    x = 11,179.91

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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.