Home / 21,689.48-29,928.16-12,254.60

Finding the Fourth Proportional to 21,689.48, 29,928.16 and 12,254.60

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Solution

The fourth proportional to 21,689.48, 29,928.16 and 12,254.60 is: 16,909.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.48 : 29,928.16 = 12,254.60 : x
  2. Step 2: Convert to fraction form
    21,689.48/29,928.16 = 12,254.60/x
  3. Step 3: Cross multiply
    21,689.48x = 29,928.16 × 12,254.60
  4. Step 4: Simplify right side
    21,689.48x = 366,757,629.54
  5. Step 5: Solve for x
    x = 366,757,629.54/21,689.48
  6. Step 6: Final answer
    x = 16,909.47

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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.