Home / 13,869.48-20,829.28-12,756.89

Finding the Fourth Proportional to 13,869.48, 20,829.28 and 12,756.89

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Solution

The fourth proportional to 13,869.48, 20,829.28 and 12,756.89 is: 19,158.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.48 : 20,829.28 = 12,756.89 : x
  2. Step 2: Convert to fraction form
    13,869.48/20,829.28 = 12,756.89/x
  3. Step 3: Cross multiply
    13,869.48x = 20,829.28 × 12,756.89
  4. Step 4: Simplify right side
    13,869.48x = 265,716,853.92
  5. Step 5: Solve for x
    x = 265,716,853.92/13,869.48
  6. Step 6: Final answer
    x = 19,158.39

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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.