Home / 30,740.32-42,421.20-17,311.72

Finding the Fourth Proportional to 30,740.32, 42,421.20 and 17,311.72

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Solution

The fourth proportional to 30,740.32, 42,421.20 and 17,311.72 is: 23,889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,740.32 : 42,421.20 = 17,311.72 : x
  2. Step 2: Convert to fraction form
    30,740.32/42,421.20 = 17,311.72/x
  3. Step 3: Cross multiply
    30,740.32x = 42,421.20 × 17,311.72
  4. Step 4: Simplify right side
    30,740.32x = 734,383,936.46
  5. Step 5: Solve for x
    x = 734,383,936.46/30,740.32
  6. Step 6: Final answer
    x = 23,889.92

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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.