Home / 13,784.28-19,022.48-7,815.81

Finding the Fourth Proportional to 13,784.28, 19,022.48 and 7,815.81

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Solution

The fourth proportional to 13,784.28, 19,022.48 and 7,815.81 is: 10,785.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,784.28 : 19,022.48 = 7,815.81 : x
  2. Step 2: Convert to fraction form
    13,784.28/19,022.48 = 7,815.81/x
  3. Step 3: Cross multiply
    13,784.28x = 19,022.48 × 7,815.81
  4. Step 4: Simplify right side
    13,784.28x = 148,676,089.41
  5. Step 5: Solve for x
    x = 148,676,089.41/13,784.28
  6. Step 6: Final answer
    x = 10,785.92

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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.