Home / 21,158.85-31,740.39-7,835.43

Finding the Fourth Proportional to 21,158.85, 31,740.39 and 7,835.43

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Solution

The fourth proportional to 21,158.85, 31,740.39 and 7,835.43 is: 11,753.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.85 : 31,740.39 = 7,835.43 : x
  2. Step 2: Convert to fraction form
    21,158.85/31,740.39 = 7,835.43/x
  3. Step 3: Cross multiply
    21,158.85x = 31,740.39 × 7,835.43
  4. Step 4: Simplify right side
    21,158.85x = 248,699,723.04
  5. Step 5: Solve for x
    x = 248,699,723.04/21,158.85
  6. Step 6: Final answer
    x = 11,753.93

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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.