Home / 13,925.28-20,906.64-13,778.40

Finding the Fourth Proportional to 13,925.28, 20,906.64 and 13,778.40

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Solution

The fourth proportional to 13,925.28, 20,906.64 and 13,778.40 is: 20,686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,925.28 : 20,906.64 = 13,778.40 : x
  2. Step 2: Convert to fraction form
    13,925.28/20,906.64 = 13,778.40/x
  3. Step 3: Cross multiply
    13,925.28x = 20,906.64 × 13,778.40
  4. Step 4: Simplify right side
    13,925.28x = 288,060,048.58
  5. Step 5: Solve for x
    x = 288,060,048.58/13,925.28
  6. Step 6: Final answer
    x = 20,686.12

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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.