Home / 21,272.38-29,354.09-12,539.65

Finding the Fourth Proportional to 21,272.38, 29,354.09 and 12,539.65

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Solution

The fourth proportional to 21,272.38, 29,354.09 and 12,539.65 is: 17,303.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.38 : 29,354.09 = 12,539.65 : x
  2. Step 2: Convert to fraction form
    21,272.38/29,354.09 = 12,539.65/x
  3. Step 3: Cross multiply
    21,272.38x = 29,354.09 × 12,539.65
  4. Step 4: Simplify right side
    21,272.38x = 368,090,014.67
  5. Step 5: Solve for x
    x = 368,090,014.67/21,272.38
  6. Step 6: Final answer
    x = 17,303.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.