Home / 20,909.48-31,370.37-8,423.08

Finding the Fourth Proportional to 20,909.48, 31,370.37 and 8,423.08

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Solution

The fourth proportional to 20,909.48, 31,370.37 and 8,423.08 is: 12,637.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.48 : 31,370.37 = 8,423.08 : x
  2. Step 2: Convert to fraction form
    20,909.48/31,370.37 = 8,423.08/x
  3. Step 3: Cross multiply
    20,909.48x = 31,370.37 × 8,423.08
  4. Step 4: Simplify right side
    20,909.48x = 264,235,057.71
  5. Step 5: Solve for x
    x = 264,235,057.71/20,909.48
  6. Step 6: Final answer
    x = 12,637.09

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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.