Home / 21,742.86-29,998.08-12,309.60

Finding the Fourth Proportional to 21,742.86, 29,998.08 and 12,309.60

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Solution

The fourth proportional to 21,742.86, 29,998.08 and 12,309.60 is: 16,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.86 : 29,998.08 = 12,309.60 : x
  2. Step 2: Convert to fraction form
    21,742.86/29,998.08 = 12,309.60/x
  3. Step 3: Cross multiply
    21,742.86x = 29,998.08 × 12,309.60
  4. Step 4: Simplify right side
    21,742.86x = 369,264,365.57
  5. Step 5: Solve for x
    x = 369,264,365.57/21,742.86
  6. Step 6: Final answer
    x = 16,983.25

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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.