Home / 14,138.70-21,208.05-12,607.80

Finding the Fourth Proportional to 14,138.70, 21,208.05 and 12,607.80

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Solution

The fourth proportional to 14,138.70, 21,208.05 and 12,607.80 is: 18,911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.70 : 21,208.05 = 12,607.80 : x
  2. Step 2: Convert to fraction form
    14,138.70/21,208.05 = 12,607.80/x
  3. Step 3: Cross multiply
    14,138.70x = 21,208.05 × 12,607.80
  4. Step 4: Simplify right side
    14,138.70x = 267,386,852.79
  5. Step 5: Solve for x
    x = 267,386,852.79/14,138.70
  6. Step 6: Final answer
    x = 18,911.70

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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.