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Finding the Fourth Proportional to 19,953.70, 29,930.55 and 9,423.70

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Solution

The fourth proportional to 19,953.70, 29,930.55 and 9,423.70 is: 14,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953.70 : 29,930.55 = 9,423.70 : x
  2. Step 2: Convert to fraction form
    19,953.70/29,930.55 = 9,423.70/x
  3. Step 3: Cross multiply
    19,953.70x = 29,930.55 × 9,423.70
  4. Step 4: Simplify right side
    19,953.70x = 282,056,524.04
  5. Step 5: Solve for x
    x = 282,056,524.04/19,953.70
  6. Step 6: Final answer
    x = 14,135.55

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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.