Home / 30,021.50-45,031.34-12,490.88

Finding the Fourth Proportional to 30,021.50, 45,031.34 and 12,490.88

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Solution

The fourth proportional to 30,021.50, 45,031.34 and 12,490.88 is: 18,735.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,021.50 : 45,031.34 = 12,490.88 : x
  2. Step 2: Convert to fraction form
    30,021.50/45,031.34 = 12,490.88/x
  3. Step 3: Cross multiply
    30,021.50x = 45,031.34 × 12,490.88
  4. Step 4: Simplify right side
    30,021.50x = 562,480,870.25
  5. Step 5: Solve for x
    x = 562,480,870.25/30,021.50
  6. Step 6: Final answer
    x = 18,735.93

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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.