Home / 19,785.99-29,669.40-7,311.89

Finding the Fourth Proportional to 19,785.99, 29,669.40 and 7,311.89

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Solution

The fourth proportional to 19,785.99, 29,669.40 and 7,311.89 is: 10,964.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.99 : 29,669.40 = 7,311.89 : x
  2. Step 2: Convert to fraction form
    19,785.99/29,669.40 = 7,311.89/x
  3. Step 3: Cross multiply
    19,785.99x = 29,669.40 × 7,311.89
  4. Step 4: Simplify right side
    19,785.99x = 216,939,240.82
  5. Step 5: Solve for x
    x = 216,939,240.82/19,785.99
  6. Step 6: Final answer
    x = 10,964.29

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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.