Home / 30,720.40-42,392.52-17,291.92

Finding the Fourth Proportional to 30,720.40, 42,392.52 and 17,291.92

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Solution

The fourth proportional to 30,720.40, 42,392.52 and 17,291.92 is: 23,861.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.40 : 42,392.52 = 17,291.92 : x
  2. Step 2: Convert to fraction form
    30,720.40/42,392.52 = 17,291.92/x
  3. Step 3: Cross multiply
    30,720.40x = 42,392.52 × 17,291.92
  4. Step 4: Simplify right side
    30,720.40x = 733,048,064.44
  5. Step 5: Solve for x
    x = 733,048,064.44/30,720.40
  6. Step 6: Final answer
    x = 23,861.93

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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.