Home / 13,785.85-20,687.28-6,388.93

Finding the Fourth Proportional to 13,785.85, 20,687.28 and 6,388.93

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Solution

The fourth proportional to 13,785.85, 20,687.28 and 6,388.93 is: 9,587.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.85 : 20,687.28 = 6,388.93 : x
  2. Step 2: Convert to fraction form
    13,785.85/20,687.28 = 6,388.93/x
  3. Step 3: Cross multiply
    13,785.85x = 20,687.28 × 6,388.93
  4. Step 4: Simplify right side
    13,785.85x = 132,169,583.81
  5. Step 5: Solve for x
    x = 132,169,583.81/13,785.85
  6. Step 6: Final answer
    x = 9,587.34

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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.