Home / 30,948.56-42,720.12-18,373.32

Finding the Fourth Proportional to 30,948.56, 42,720.12 and 18,373.32

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Solution

The fourth proportional to 30,948.56, 42,720.12 and 18,373.32 is: 25,361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.56 : 42,720.12 = 18,373.32 : x
  2. Step 2: Convert to fraction form
    30,948.56/42,720.12 = 18,373.32/x
  3. Step 3: Cross multiply
    30,948.56x = 42,720.12 × 18,373.32
  4. Step 4: Simplify right side
    30,948.56x = 784,910,435.20
  5. Step 5: Solve for x
    x = 784,910,435.20/30,948.56
  6. Step 6: Final answer
    x = 25,361.78

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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.