Home / 30,440.61-42,000.12-18,504.45

Finding the Fourth Proportional to 30,440.61, 42,000.12 and 18,504.45

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Solution

The fourth proportional to 30,440.61, 42,000.12 and 18,504.45 is: 25,531.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.61 : 42,000.12 = 18,504.45 : x
  2. Step 2: Convert to fraction form
    30,440.61/42,000.12 = 18,504.45/x
  3. Step 3: Cross multiply
    30,440.61x = 42,000.12 × 18,504.45
  4. Step 4: Simplify right side
    30,440.61x = 777,189,120.53
  5. Step 5: Solve for x
    x = 777,189,120.53/30,440.61
  6. Step 6: Final answer
    x = 25,531.33

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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.