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Finding the Fourth Proportional to 14,001.80, 21,002.70 and 12,705.80

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Solution

The fourth proportional to 14,001.80, 21,002.70 and 12,705.80 is: 19,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,001.80 : 21,002.70 = 12,705.80 : x
  2. Step 2: Convert to fraction form
    14,001.80/21,002.70 = 12,705.80/x
  3. Step 3: Cross multiply
    14,001.80x = 21,002.70 × 12,705.80
  4. Step 4: Simplify right side
    14,001.80x = 266,856,105.66
  5. Step 5: Solve for x
    x = 266,856,105.66/14,001.80
  6. Step 6: Final answer
    x = 19,058.70

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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.