Home / 30,690.10-42,337.32-18,732.68

Finding the Fourth Proportional to 30,690.10, 42,337.32 and 18,732.68

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Solution

The fourth proportional to 30,690.10, 42,337.32 and 18,732.68 is: 25,841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.10 : 42,337.32 = 18,732.68 : x
  2. Step 2: Convert to fraction form
    30,690.10/42,337.32 = 18,732.68/x
  3. Step 3: Cross multiply
    30,690.10x = 42,337.32 × 18,732.68
  4. Step 4: Simplify right side
    30,690.10x = 793,091,255.93
  5. Step 5: Solve for x
    x = 793,091,255.93/30,690.10
  6. Step 6: Final answer
    x = 25,841.93

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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.