Home / 13,958.28-20,981.34-12,908.52

Finding the Fourth Proportional to 13,958.28, 20,981.34 and 12,908.52

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Solution

The fourth proportional to 13,958.28, 20,981.34 and 12,908.52 is: 19,403.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.28 : 20,981.34 = 12,908.52 : x
  2. Step 2: Convert to fraction form
    13,958.28/20,981.34 = 12,908.52/x
  3. Step 3: Cross multiply
    13,958.28x = 20,981.34 × 12,908.52
  4. Step 4: Simplify right side
    13,958.28x = 270,838,047.02
  5. Step 5: Solve for x
    x = 270,838,047.02/13,958.28
  6. Step 6: Final answer
    x = 19,403.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.