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Finding the Fourth Proportional to 30,012.59, 45,017.90 and 8,952.80

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Solution

The fourth proportional to 30,012.59, 45,017.90 and 8,952.80 is: 13,428.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,012.59 : 45,017.90 = 8,952.80 : x
  2. Step 2: Convert to fraction form
    30,012.59/45,017.90 = 8,952.80/x
  3. Step 3: Cross multiply
    30,012.59x = 45,017.90 × 8,952.80
  4. Step 4: Simplify right side
    30,012.59x = 403,035,985.27
  5. Step 5: Solve for x
    x = 403,035,985.27/30,012.59
  6. Step 6: Final answer
    x = 13,428.90

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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.