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Finding the Fourth Proportional to 22,247.69, 30,702.21 and 12,688.67

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Solution

The fourth proportional to 22,247.69, 30,702.21 and 12,688.67 is: 17,510.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,247.69 : 30,702.21 = 12,688.67 : x
  2. Step 2: Convert to fraction form
    22,247.69/30,702.21 = 12,688.67/x
  3. Step 3: Cross multiply
    22,247.69x = 30,702.21 × 12,688.67
  4. Step 4: Simplify right side
    22,247.69x = 389,570,240.13
  5. Step 5: Solve for x
    x = 389,570,240.13/22,247.69
  6. Step 6: Final answer
    x = 17,510.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.