Home / 30,017.72-45,002.20-12,500.64

Finding the Fourth Proportional to 30,017.72, 45,002.20 and 12,500.64

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Solution

The fourth proportional to 30,017.72, 45,002.20 and 12,500.64 is: 18,740.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,017.72 : 45,002.20 = 12,500.64 : x
  2. Step 2: Convert to fraction form
    30,017.72/45,002.20 = 12,500.64/x
  3. Step 3: Cross multiply
    30,017.72x = 45,002.20 × 12,500.64
  4. Step 4: Simplify right side
    30,017.72x = 562,556,301.41
  5. Step 5: Solve for x
    x = 562,556,301.41/30,017.72
  6. Step 6: Final answer
    x = 18,740.81

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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.