Home / 21,239.04-29,309.23-11,678.91

Finding the Fourth Proportional to 21,239.04, 29,309.23 and 11,678.91

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Solution

The fourth proportional to 21,239.04, 29,309.23 and 11,678.91 is: 16,116.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.04 : 29,309.23 = 11,678.91 : x
  2. Step 2: Convert to fraction form
    21,239.04/29,309.23 = 11,678.91/x
  3. Step 3: Cross multiply
    21,239.04x = 29,309.23 × 11,678.91
  4. Step 4: Simplify right side
    21,239.04x = 342,299,859.34
  5. Step 5: Solve for x
    x = 342,299,859.34/21,239.04
  6. Step 6: Final answer
    x = 16,116.54

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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.