Home / 13,428.59-20,115.46-6,387.30

Finding the Fourth Proportional to 13,428.59, 20,115.46 and 6,387.30

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Solution

The fourth proportional to 13,428.59, 20,115.46 and 6,387.30 is: 9,567.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.59 : 20,115.46 = 6,387.30 : x
  2. Step 2: Convert to fraction form
    13,428.59/20,115.46 = 6,387.30/x
  3. Step 3: Cross multiply
    13,428.59x = 20,115.46 × 6,387.30
  4. Step 4: Simplify right side
    13,428.59x = 128,483,461.69
  5. Step 5: Solve for x
    x = 128,483,461.69/13,428.59
  6. Step 6: Final answer
    x = 9,567.91

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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.