Home / 30,017.79-45,031.64-12,488.85

Finding the Fourth Proportional to 30,017.79, 45,031.64 and 12,488.85

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Solution

The fourth proportional to 30,017.79, 45,031.64 and 12,488.85 is: 18,735.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,017.79 : 45,031.64 = 12,488.85 : x
  2. Step 2: Convert to fraction form
    30,017.79/45,031.64 = 12,488.85/x
  3. Step 3: Cross multiply
    30,017.79x = 45,031.64 × 12,488.85
  4. Step 4: Simplify right side
    30,017.79x = 562,393,334.77
  5. Step 5: Solve for x
    x = 562,393,334.77/30,017.79
  6. Step 6: Final answer
    x = 18,735.33

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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.