Home / 21,869.22-30,176.64-12,309.60

Finding the Fourth Proportional to 21,869.22, 30,176.64 and 12,309.60

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Solution

The fourth proportional to 21,869.22, 30,176.64 and 12,309.60 is: 16,985.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.22 : 30,176.64 = 12,309.60 : x
  2. Step 2: Convert to fraction form
    21,869.22/30,176.64 = 12,309.60/x
  3. Step 3: Cross multiply
    21,869.22x = 30,176.64 × 12,309.60
  4. Step 4: Simplify right side
    21,869.22x = 371,462,367.74
  5. Step 5: Solve for x
    x = 371,462,367.74/21,869.22
  6. Step 6: Final answer
    x = 16,985.62

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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.