Home / 31,703.55-47,520.99-20,618.19

Finding the Fourth Proportional to 31,703.55, 47,520.99 and 20,618.19

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Solution

The fourth proportional to 31,703.55, 47,520.99 and 20,618.19 is: 30,904.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,703.55 : 47,520.99 = 20,618.19 : x
  2. Step 2: Convert to fraction form
    31,703.55/47,520.99 = 20,618.19/x
  3. Step 3: Cross multiply
    31,703.55x = 47,520.99 × 20,618.19
  4. Step 4: Simplify right side
    31,703.55x = 979,796,800.81
  5. Step 5: Solve for x
    x = 979,796,800.81/31,703.55
  6. Step 6: Final answer
    x = 30,904.96

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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.