Home / 40,890.99-61,336.41-12,813.20

Finding the Fourth Proportional to 40,890.99, 61,336.41 and 12,813.20

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Solution

The fourth proportional to 40,890.99, 61,336.41 and 12,813.20 is: 19,219.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,890.99 : 61,336.41 = 12,813.20 : x
  2. Step 2: Convert to fraction form
    40,890.99/61,336.41 = 12,813.20/x
  3. Step 3: Cross multiply
    40,890.99x = 61,336.41 × 12,813.20
  4. Step 4: Simplify right side
    40,890.99x = 785,915,381.93
  5. Step 5: Solve for x
    x = 785,915,381.93/40,890.99
  6. Step 6: Final answer
    x = 19,219.77

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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.