Home / 13,488.90-20,235.18-12,668.76

Finding the Fourth Proportional to 13,488.90, 20,235.18 and 12,668.76

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Solution

The fourth proportional to 13,488.90, 20,235.18 and 12,668.76 is: 19,004.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,488.90 : 20,235.18 = 12,668.76 : x
  2. Step 2: Convert to fraction form
    13,488.90/20,235.18 = 12,668.76/x
  3. Step 3: Cross multiply
    13,488.90x = 20,235.18 × 12,668.76
  4. Step 4: Simplify right side
    13,488.90x = 256,354,638.98
  5. Step 5: Solve for x
    x = 256,354,638.98/13,488.90
  6. Step 6: Final answer
    x = 19,004.86

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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.