Home / 20,456.10-28,231.55-12,503.62

Finding the Fourth Proportional to 20,456.10, 28,231.55 and 12,503.62

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Solution

The fourth proportional to 20,456.10, 28,231.55 and 12,503.62 is: 17,256.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.10 : 28,231.55 = 12,503.62 : x
  2. Step 2: Convert to fraction form
    20,456.10/28,231.55 = 12,503.62/x
  3. Step 3: Cross multiply
    20,456.10x = 28,231.55 × 12,503.62
  4. Step 4: Simplify right side
    20,456.10x = 352,996,573.21
  5. Step 5: Solve for x
    x = 352,996,573.21/20,456.10
  6. Step 6: Final answer
    x = 17,256.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.