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Finding the Fourth Proportional to 20,423.52, 30,623.79 and 7,090.29

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Solution

The fourth proportional to 20,423.52, 30,623.79 and 7,090.29 is: 10,631.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.52 : 30,623.79 = 7,090.29 : x
  2. Step 2: Convert to fraction form
    20,423.52/30,623.79 = 7,090.29/x
  3. Step 3: Cross multiply
    20,423.52x = 30,623.79 × 7,090.29
  4. Step 4: Simplify right side
    20,423.52x = 217,131,552.00
  5. Step 5: Solve for x
    x = 217,131,552.00/20,423.52
  6. Step 6: Final answer
    x = 10,631.45

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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.