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Finding the Fourth Proportional to 30.14, 45.21 and 13

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Solution

The fourth proportional to 30.14, 45.21 and 13 is: 19.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.14 : 45.21 = 13 : x
  2. Step 2: Convert to fraction form
    30.14/45.21 = 13/x
  3. Step 3: Cross multiply
    30.14x = 45.21 × 13
  4. Step 4: Simplify right side
    30.14x = 587.67
  5. Step 5: Solve for x
    x = 587.67/30.14
  6. Step 6: Final answer
    x = 19.50

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.