Home / 30,855.32-42,580.04-18,108.62

Finding the Fourth Proportional to 30,855.32, 42,580.04 and 18,108.62

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Solution

The fourth proportional to 30,855.32, 42,580.04 and 18,108.62 is: 24,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,855.32 : 42,580.04 = 18,108.62 : x
  2. Step 2: Convert to fraction form
    30,855.32/42,580.04 = 18,108.62/x
  3. Step 3: Cross multiply
    30,855.32x = 42,580.04 × 18,108.62
  4. Step 4: Simplify right side
    30,855.32x = 771,065,763.94
  5. Step 5: Solve for x
    x = 771,065,763.94/30,855.32
  6. Step 6: Final answer
    x = 24,989.72

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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.