Home / 21,384.12-29,509.15-11,693.39

Finding the Fourth Proportional to 21,384.12, 29,509.15 and 11,693.39

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Solution

The fourth proportional to 21,384.12, 29,509.15 and 11,693.39 is: 16,136.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.12 : 29,509.15 = 11,693.39 : x
  2. Step 2: Convert to fraction form
    21,384.12/29,509.15 = 11,693.39/x
  3. Step 3: Cross multiply
    21,384.12x = 29,509.15 × 11,693.39
  4. Step 4: Simplify right side
    21,384.12x = 345,061,999.52
  5. Step 5: Solve for x
    x = 345,061,999.52/21,384.12
  6. Step 6: Final answer
    x = 16,136.37

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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.