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Finding the Fourth Proportional to 14,267.52, 19,645.20 and 12,139.20

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Solution

The fourth proportional to 14,267.52, 19,645.20 and 12,139.20 is: 16,714.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,267.52 : 19,645.20 = 12,139.20 : x
  2. Step 2: Convert to fraction form
    14,267.52/19,645.20 = 12,139.20/x
  3. Step 3: Cross multiply
    14,267.52x = 19,645.20 × 12,139.20
  4. Step 4: Simplify right side
    14,267.52x = 238,477,011.84
  5. Step 5: Solve for x
    x = 238,477,011.84/14,267.52
  6. Step 6: Final answer
    x = 16,714.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.