Home / 13,785.80-20,678.70-3,925.40

Finding the Fourth Proportional to 13,785.80, 20,678.70 and 3,925.40

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Solution

The fourth proportional to 13,785.80, 20,678.70 and 3,925.40 is: 5,888.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.80 : 20,678.70 = 3,925.40 : x
  2. Step 2: Convert to fraction form
    13,785.80/20,678.70 = 3,925.40/x
  3. Step 3: Cross multiply
    13,785.80x = 20,678.70 × 3,925.40
  4. Step 4: Simplify right side
    13,785.80x = 81,172,168.98
  5. Step 5: Solve for x
    x = 81,172,168.98/13,785.80
  6. Step 6: Final answer
    x = 5,888.10

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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.