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Finding the Fourth Proportional to 19,868.90, 29,783.90 and 9,487.94

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Solution

The fourth proportional to 19,868.90, 29,783.90 and 9,487.94 is: 14,222.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,868.90 : 29,783.90 = 9,487.94 : x
  2. Step 2: Convert to fraction form
    19,868.90/29,783.90 = 9,487.94/x
  3. Step 3: Cross multiply
    19,868.90x = 29,783.90 × 9,487.94
  4. Step 4: Simplify right side
    19,868.90x = 282,587,730.97
  5. Step 5: Solve for x
    x = 282,587,730.97/19,868.90
  6. Step 6: Final answer
    x = 14,222.62

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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.