Home / 20,572.11-30,858.06-4,989.72

Finding the Fourth Proportional to 20,572.11, 30,858.06 and 4,989.72

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Solution

The fourth proportional to 20,572.11, 30,858.06 and 4,989.72 is: 7,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.11 : 30,858.06 = 4,989.72 : x
  2. Step 2: Convert to fraction form
    20,572.11/30,858.06 = 4,989.72/x
  3. Step 3: Cross multiply
    20,572.11x = 30,858.06 × 4,989.72
  4. Step 4: Simplify right side
    20,572.11x = 153,973,079.14
  5. Step 5: Solve for x
    x = 153,973,079.14/20,572.11
  6. Step 6: Final answer
    x = 7,484.55

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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.