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Finding the Fourth Proportional to 14,280.76, 19,706.76 and 7,906.90

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Solution

The fourth proportional to 14,280.76, 19,706.76 and 7,906.90 is: 10,911.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,280.76 : 19,706.76 = 7,906.90 : x
  2. Step 2: Convert to fraction form
    14,280.76/19,706.76 = 7,906.90/x
  3. Step 3: Cross multiply
    14,280.76x = 19,706.76 × 7,906.90
  4. Step 4: Simplify right side
    14,280.76x = 155,819,390.38
  5. Step 5: Solve for x
    x = 155,819,390.38/14,280.76
  6. Step 6: Final answer
    x = 10,911.15

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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.