Home / 30,645.12-42,294.84-18,715.32

Finding the Fourth Proportional to 30,645.12, 42,294.84 and 18,715.32

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Solution

The fourth proportional to 30,645.12, 42,294.84 and 18,715.32 is: 25,829.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,645.12 : 42,294.84 = 18,715.32 : x
  2. Step 2: Convert to fraction form
    30,645.12/42,294.84 = 18,715.32/x
  3. Step 3: Cross multiply
    30,645.12x = 42,294.84 × 18,715.32
  4. Step 4: Simplify right side
    30,645.12x = 791,561,464.95
  5. Step 5: Solve for x
    x = 791,561,464.95/30,645.12
  6. Step 6: Final answer
    x = 25,829.94

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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.