Home / 20,280.08-30,420.12-13,265.99

Finding the Fourth Proportional to 20,280.08, 30,420.12 and 13,265.99

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Solution

The fourth proportional to 20,280.08, 30,420.12 and 13,265.99 is: 19,898.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.08 : 30,420.12 = 13,265.99 : x
  2. Step 2: Convert to fraction form
    20,280.08/30,420.12 = 13,265.99/x
  3. Step 3: Cross multiply
    20,280.08x = 30,420.12 × 13,265.99
  4. Step 4: Simplify right side
    20,280.08x = 403,553,007.72
  5. Step 5: Solve for x
    x = 403,553,007.72/20,280.08
  6. Step 6: Final answer
    x = 19,898.99

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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.