Home / 21,362.10-29,478.80-12,286.77

Finding the Fourth Proportional to 21,362.10, 29,478.80 and 12,286.77

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Solution

The fourth proportional to 21,362.10, 29,478.80 and 12,286.77 is: 16,955.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.10 : 29,478.80 = 12,286.77 : x
  2. Step 2: Convert to fraction form
    21,362.10/29,478.80 = 12,286.77/x
  3. Step 3: Cross multiply
    21,362.10x = 29,478.80 × 12,286.77
  4. Step 4: Simplify right side
    21,362.10x = 362,199,284.59
  5. Step 5: Solve for x
    x = 362,199,284.59/21,362.10
  6. Step 6: Final answer
    x = 16,955.23

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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.