Home / 21,908.28-30,238.80-12,482.40

Finding the Fourth Proportional to 21,908.28, 30,238.80 and 12,482.40

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Solution

The fourth proportional to 21,908.28, 30,238.80 and 12,482.40 is: 17,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.28 : 30,238.80 = 12,482.40 : x
  2. Step 2: Convert to fraction form
    21,908.28/30,238.80 = 12,482.40/x
  3. Step 3: Cross multiply
    21,908.28x = 30,238.80 × 12,482.40
  4. Step 4: Simplify right side
    21,908.28x = 377,452,797.12
  5. Step 5: Solve for x
    x = 377,452,797.12/21,908.28
  6. Step 6: Final answer
    x = 17,228.77

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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.