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Finding the Fourth Proportional to 30,000.72, 45,000.53 and 8,955.05

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Solution

The fourth proportional to 30,000.72, 45,000.53 and 8,955.05 is: 13,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,000.72 : 45,000.53 = 8,955.05 : x
  2. Step 2: Convert to fraction form
    30,000.72/45,000.53 = 8,955.05/x
  3. Step 3: Cross multiply
    30,000.72x = 45,000.53 × 8,955.05
  4. Step 4: Simplify right side
    30,000.72x = 402,981,759.98
  5. Step 5: Solve for x
    x = 402,981,759.98/30,000.72
  6. Step 6: Final answer
    x = 13,432.40

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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.