Home / 30,740.86-42,419.28-17,311.78

Finding the Fourth Proportional to 30,740.86, 42,419.28 and 17,311.78

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Solution

The fourth proportional to 30,740.86, 42,419.28 and 17,311.78 is: 23,888.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,740.86 : 42,419.28 = 17,311.78 : x
  2. Step 2: Convert to fraction form
    30,740.86/42,419.28 = 17,311.78/x
  3. Step 3: Cross multiply
    30,740.86x = 42,419.28 × 17,311.78
  4. Step 4: Simplify right side
    30,740.86x = 734,353,243.12
  5. Step 5: Solve for x
    x = 734,353,243.12/30,740.86
  6. Step 6: Final answer
    x = 23,888.51

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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.