Home / 13,420.60-20,128.08-5,097.68

Finding the Fourth Proportional to 13,420.60, 20,128.08 and 5,097.68

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Solution

The fourth proportional to 13,420.60, 20,128.08 and 5,097.68 is: 7,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.60 : 20,128.08 = 5,097.68 : x
  2. Step 2: Convert to fraction form
    13,420.60/20,128.08 = 5,097.68/x
  3. Step 3: Cross multiply
    13,420.60x = 20,128.08 × 5,097.68
  4. Step 4: Simplify right side
    13,420.60x = 102,606,510.85
  5. Step 5: Solve for x
    x = 102,606,510.85/13,420.60
  6. Step 6: Final answer
    x = 7,645.45

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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.