Home / 14,123.40-21,185.10-12,859.80

Finding the Fourth Proportional to 14,123.40, 21,185.10 and 12,859.80

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Solution

The fourth proportional to 14,123.40, 21,185.10 and 12,859.80 is: 19,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,123.40 : 21,185.10 = 12,859.80 : x
  2. Step 2: Convert to fraction form
    14,123.40/21,185.10 = 12,859.80/x
  3. Step 3: Cross multiply
    14,123.40x = 21,185.10 × 12,859.80
  4. Step 4: Simplify right side
    14,123.40x = 272,436,148.98
  5. Step 5: Solve for x
    x = 272,436,148.98/14,123.40
  6. Step 6: Final answer
    x = 19,289.70

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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.