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Finding the Fourth Proportional to 30,057.78, 45,070.01 and 12,300.91

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Solution

The fourth proportional to 30,057.78, 45,070.01 and 12,300.91 is: 18,444.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,057.78 : 45,070.01 = 12,300.91 : x
  2. Step 2: Convert to fraction form
    30,057.78/45,070.01 = 12,300.91/x
  3. Step 3: Cross multiply
    30,057.78x = 45,070.01 × 12,300.91
  4. Step 4: Simplify right side
    30,057.78x = 554,401,911.36
  5. Step 5: Solve for x
    x = 554,401,911.36/30,057.78
  6. Step 6: Final answer
    x = 18,444.54

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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.