Home / 20,298.45-28,009.87-12,742.36

Finding the Fourth Proportional to 20,298.45, 28,009.87 and 12,742.36

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Solution

The fourth proportional to 20,298.45, 28,009.87 and 12,742.36 is: 17,583.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.45 : 28,009.87 = 12,742.36 : x
  2. Step 2: Convert to fraction form
    20,298.45/28,009.87 = 12,742.36/x
  3. Step 3: Cross multiply
    20,298.45x = 28,009.87 × 12,742.36
  4. Step 4: Simplify right side
    20,298.45x = 356,911,847.09
  5. Step 5: Solve for x
    x = 356,911,847.09/20,298.45
  6. Step 6: Final answer
    x = 17,583.21

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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.