Home / 31,041.50-42,807.49-20,855.54

Finding the Fourth Proportional to 31,041.50, 42,807.49 and 20,855.54

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Solution

The fourth proportional to 31,041.50, 42,807.49 and 20,855.54 is: 28,760.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,041.50 : 42,807.49 = 20,855.54 : x
  2. Step 2: Convert to fraction form
    31,041.50/42,807.49 = 20,855.54/x
  3. Step 3: Cross multiply
    31,041.50x = 42,807.49 × 20,855.54
  4. Step 4: Simplify right side
    31,041.50x = 892,773,374.87
  5. Step 5: Solve for x
    x = 892,773,374.87/31,041.50
  6. Step 6: Final answer
    x = 28,760.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.