Home / 20,430.70-30,646.10-6,390.82

Finding the Fourth Proportional to 20,430.70, 30,646.10 and 6,390.82

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Solution

The fourth proportional to 20,430.70, 30,646.10 and 6,390.82 is: 9,586.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.70 : 30,646.10 = 6,390.82 : x
  2. Step 2: Convert to fraction form
    20,430.70/30,646.10 = 6,390.82/x
  3. Step 3: Cross multiply
    20,430.70x = 30,646.10 × 6,390.82
  4. Step 4: Simplify right side
    20,430.70x = 195,853,763.09
  5. Step 5: Solve for x
    x = 195,853,763.09/20,430.70
  6. Step 6: Final answer
    x = 9,586.25

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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.