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Finding the Fourth Proportional to 19,409.40, 29,070.90 and 16,817.40

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Solution

The fourth proportional to 19,409.40, 29,070.90 and 16,817.40 is: 25,188.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.40 : 29,070.90 = 16,817.40 : x
  2. Step 2: Convert to fraction form
    19,409.40/29,070.90 = 16,817.40/x
  3. Step 3: Cross multiply
    19,409.40x = 29,070.90 × 16,817.40
  4. Step 4: Simplify right side
    19,409.40x = 488,896,953.66
  5. Step 5: Solve for x
    x = 488,896,953.66/19,409.40
  6. Step 6: Final answer
    x = 25,188.67

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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.