Home / 21,686.40-29,928.48-12,258.24

Finding the Fourth Proportional to 21,686.40, 29,928.48 and 12,258.24

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Solution

The fourth proportional to 21,686.40, 29,928.48 and 12,258.24 is: 16,917.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.40 : 29,928.48 = 12,258.24 : x
  2. Step 2: Convert to fraction form
    21,686.40/29,928.48 = 12,258.24/x
  3. Step 3: Cross multiply
    21,686.40x = 29,928.48 × 12,258.24
  4. Step 4: Simplify right side
    21,686.40x = 366,870,490.68
  5. Step 5: Solve for x
    x = 366,870,490.68/21,686.40
  6. Step 6: Final answer
    x = 16,917.08

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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.