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Finding the Fourth Proportional to 19,812.90, 29,718.27 and 6,663.90

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Solution

The fourth proportional to 19,812.90, 29,718.27 and 6,663.90 is: 9,995.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.90 : 29,718.27 = 6,663.90 : x
  2. Step 2: Convert to fraction form
    19,812.90/29,718.27 = 6,663.90/x
  3. Step 3: Cross multiply
    19,812.90x = 29,718.27 × 6,663.90
  4. Step 4: Simplify right side
    19,812.90x = 198,039,579.45
  5. Step 5: Solve for x
    x = 198,039,579.45/19,812.90
  6. Step 6: Final answer
    x = 9,995.49

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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.