Home / 38,720.50-58,074.37-12,421.82

Finding the Fourth Proportional to 38,720.50, 58,074.37 and 12,421.82

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Solution

The fourth proportional to 38,720.50, 58,074.37 and 12,421.82 is: 18,630.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,720.50 : 58,074.37 = 12,421.82 : x
  2. Step 2: Convert to fraction form
    38,720.50/58,074.37 = 12,421.82/x
  3. Step 3: Cross multiply
    38,720.50x = 58,074.37 × 12,421.82
  4. Step 4: Simplify right side
    38,720.50x = 721,389,484.88
  5. Step 5: Solve for x
    x = 721,389,484.88/38,720.50
  6. Step 6: Final answer
    x = 18,630.69

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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.