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Finding the Fourth Proportional to 30,012.72, 45,019.02 and 8,952.20

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Solution

The fourth proportional to 30,012.72, 45,019.02 and 8,952.20 is: 13,428.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,012.72 : 45,019.02 = 8,952.20 : x
  2. Step 2: Convert to fraction form
    30,012.72/45,019.02 = 8,952.20/x
  3. Step 3: Cross multiply
    30,012.72x = 45,019.02 × 8,952.20
  4. Step 4: Simplify right side
    30,012.72x = 403,019,270.84
  5. Step 5: Solve for x
    x = 403,019,270.84/30,012.72
  6. Step 6: Final answer
    x = 13,428.28

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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.