Home / 21,215.58-29,273.64-12,259.80

Finding the Fourth Proportional to 21,215.58, 29,273.64 and 12,259.80

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Solution

The fourth proportional to 21,215.58, 29,273.64 and 12,259.80 is: 16,916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.58 : 29,273.64 = 12,259.80 : x
  2. Step 2: Convert to fraction form
    21,215.58/29,273.64 = 12,259.80/x
  3. Step 3: Cross multiply
    21,215.58x = 29,273.64 × 12,259.80
  4. Step 4: Simplify right side
    21,215.58x = 358,888,971.67
  5. Step 5: Solve for x
    x = 358,888,971.67/21,215.58
  6. Step 6: Final answer
    x = 16,916.29

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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.