Home / 21,189.12-31,798.08-7,338

Finding the Fourth Proportional to 21,189.12, 31,798.08 and 7,338

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Solution

The fourth proportional to 21,189.12, 31,798.08 and 7,338 is: 11,011.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.12 : 31,798.08 = 7,338 : x
  2. Step 2: Convert to fraction form
    21,189.12/31,798.08 = 7,338/x
  3. Step 3: Cross multiply
    21,189.12x = 31,798.08 × 7,338
  4. Step 4: Simplify right side
    21,189.12x = 233,334,311.04
  5. Step 5: Solve for x
    x = 233,334,311.04/21,189.12
  6. Step 6: Final answer
    x = 11,011.99

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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.