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Finding the Fourth Proportional to 30,125.99, 45,130.17 and 14,308.52

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Solution

The fourth proportional to 30,125.99, 45,130.17 and 14,308.52 is: 21,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,125.99 : 45,130.17 = 14,308.52 : x
  2. Step 2: Convert to fraction form
    30,125.99/45,130.17 = 14,308.52/x
  3. Step 3: Cross multiply
    30,125.99x = 45,130.17 × 14,308.52
  4. Step 4: Simplify right side
    30,125.99x = 645,745,768.05
  5. Step 5: Solve for x
    x = 645,745,768.05/30,125.99
  6. Step 6: Final answer
    x = 21,434.84

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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.