Home / 13,619.68-20,421.60-5,289.94

Finding the Fourth Proportional to 13,619.68, 20,421.60 and 5,289.94

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Solution

The fourth proportional to 13,619.68, 20,421.60 and 5,289.94 is: 7,931.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.68 : 20,421.60 = 5,289.94 : x
  2. Step 2: Convert to fraction form
    13,619.68/20,421.60 = 5,289.94/x
  3. Step 3: Cross multiply
    13,619.68x = 20,421.60 × 5,289.94
  4. Step 4: Simplify right side
    13,619.68x = 108,029,044.39
  5. Step 5: Solve for x
    x = 108,029,044.39/13,619.68
  6. Step 6: Final answer
    x = 7,931.84

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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.