Home / 20,742.08-31,119.35-9,655.34

Finding the Fourth Proportional to 20,742.08, 31,119.35 and 9,655.34

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Solution

The fourth proportional to 20,742.08, 31,119.35 and 9,655.34 is: 14,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.08 : 31,119.35 = 9,655.34 : x
  2. Step 2: Convert to fraction form
    20,742.08/31,119.35 = 9,655.34/x
  3. Step 3: Cross multiply
    20,742.08x = 31,119.35 × 9,655.34
  4. Step 4: Simplify right side
    20,742.08x = 300,467,700.96
  5. Step 5: Solve for x
    x = 300,467,700.96/20,742.08
  6. Step 6: Final answer
    x = 14,485.90

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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.