Home / 21,689.76-29,935.96-12,258.32

Finding the Fourth Proportional to 21,689.76, 29,935.96 and 12,258.32

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Solution

The fourth proportional to 21,689.76, 29,935.96 and 12,258.32 is: 16,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.76 : 29,935.96 = 12,258.32 : x
  2. Step 2: Convert to fraction form
    21,689.76/29,935.96 = 12,258.32/x
  3. Step 3: Cross multiply
    21,689.76x = 29,935.96 × 12,258.32
  4. Step 4: Simplify right side
    21,689.76x = 366,964,577.19
  5. Step 5: Solve for x
    x = 366,964,577.19/21,689.76
  6. Step 6: Final answer
    x = 16,918.79

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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.