Home / 11,456.20-15,809.12-6,420.47

Finding the Fourth Proportional to 11,456.20, 15,809.12 and 6,420.47

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Solution

The fourth proportional to 11,456.20, 15,809.12 and 6,420.47 is: 8,860.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,456.20 : 15,809.12 = 6,420.47 : x
  2. Step 2: Convert to fraction form
    11,456.20/15,809.12 = 6,420.47/x
  3. Step 3: Cross multiply
    11,456.20x = 15,809.12 × 6,420.47
  4. Step 4: Simplify right side
    11,456.20x = 101,501,893.62
  5. Step 5: Solve for x
    x = 101,501,893.62/11,456.20
  6. Step 6: Final answer
    x = 8,860.00

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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.