Home / 21,718.48-29,969.84-12,287.64

Finding the Fourth Proportional to 21,718.48, 29,969.84 and 12,287.64

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Solution

The fourth proportional to 21,718.48, 29,969.84 and 12,287.64 is: 16,956.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.48 : 29,969.84 = 12,287.64 : x
  2. Step 2: Convert to fraction form
    21,718.48/29,969.84 = 12,287.64/x
  3. Step 3: Cross multiply
    21,718.48x = 29,969.84 × 12,287.64
  4. Step 4: Simplify right side
    21,718.48x = 368,258,604.78
  5. Step 5: Solve for x
    x = 368,258,604.78/21,718.48
  6. Step 6: Final answer
    x = 16,956.00

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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.