Home / 30,690.22-42,337.50-18,732.80

Finding the Fourth Proportional to 30,690.22, 42,337.50 and 18,732.80

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Solution

The fourth proportional to 30,690.22, 42,337.50 and 18,732.80 is: 25,842.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.22 : 42,337.50 = 18,732.80 : x
  2. Step 2: Convert to fraction form
    30,690.22/42,337.50 = 18,732.80/x
  3. Step 3: Cross multiply
    30,690.22x = 42,337.50 × 18,732.80
  4. Step 4: Simplify right side
    30,690.22x = 793,099,826.34
  5. Step 5: Solve for x
    x = 793,099,826.34/30,690.22
  6. Step 6: Final answer
    x = 25,842.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.