Home / 14,707.76-20,296.40-8,420.56

Finding the Fourth Proportional to 14,707.76, 20,296.40 and 8,420.56

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Solution

The fourth proportional to 14,707.76, 20,296.40 and 8,420.56 is: 11,620.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,707.76 : 20,296.40 = 8,420.56 : x
  2. Step 2: Convert to fraction form
    14,707.76/20,296.40 = 8,420.56/x
  3. Step 3: Cross multiply
    14,707.76x = 20,296.40 × 8,420.56
  4. Step 4: Simplify right side
    14,707.76x = 170,907,053.98
  5. Step 5: Solve for x
    x = 170,907,053.98/14,707.76
  6. Step 6: Final answer
    x = 11,620.20

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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.