Home / 30,720.56-42,385.88-17,291.03

Finding the Fourth Proportional to 30,720.56, 42,385.88 and 17,291.03

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Solution

The fourth proportional to 30,720.56, 42,385.88 and 17,291.03 is: 23,856.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.56 : 42,385.88 = 17,291.03 : x
  2. Step 2: Convert to fraction form
    30,720.56/42,385.88 = 17,291.03/x
  3. Step 3: Cross multiply
    30,720.56x = 42,385.88 × 17,291.03
  4. Step 4: Simplify right side
    30,720.56x = 732,895,353.95
  5. Step 5: Solve for x
    x = 732,895,353.95/30,720.56
  6. Step 6: Final answer
    x = 23,856.84

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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.