Home / 13,421.84-20,132.76-5,639.36

Finding the Fourth Proportional to 13,421.84, 20,132.76 and 5,639.36

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Solution

The fourth proportional to 13,421.84, 20,132.76 and 5,639.36 is: 8,459.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.84 : 20,132.76 = 5,639.36 : x
  2. Step 2: Convert to fraction form
    13,421.84/20,132.76 = 5,639.36/x
  3. Step 3: Cross multiply
    13,421.84x = 20,132.76 × 5,639.36
  4. Step 4: Simplify right side
    13,421.84x = 113,535,881.43
  5. Step 5: Solve for x
    x = 113,535,881.43/13,421.84
  6. Step 6: Final answer
    x = 8,459.04

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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.