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Finding the Fourth Proportional to 61,993.80, 92,990.70 and 20,435.40

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Solution

The fourth proportional to 61,993.80, 92,990.70 and 20,435.40 is: 30,653.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,993.80 : 92,990.70 = 20,435.40 : x
  2. Step 2: Convert to fraction form
    61,993.80/92,990.70 = 20,435.40/x
  3. Step 3: Cross multiply
    61,993.80x = 92,990.70 × 20,435.40
  4. Step 4: Simplify right side
    61,993.80x = 1,900,302,150.78
  5. Step 5: Solve for x
    x = 1,900,302,150.78/61,993.80
  6. Step 6: Final answer
    x = 30,653.10

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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.