Home / 21,740.18-30,006.12-13,245.06

Finding the Fourth Proportional to 21,740.18, 30,006.12 and 13,245.06

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Solution

The fourth proportional to 21,740.18, 30,006.12 and 13,245.06 is: 18,281.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.18 : 30,006.12 = 13,245.06 : x
  2. Step 2: Convert to fraction form
    21,740.18/30,006.12 = 13,245.06/x
  3. Step 3: Cross multiply
    21,740.18x = 30,006.12 × 13,245.06
  4. Step 4: Simplify right side
    21,740.18x = 397,432,859.77
  5. Step 5: Solve for x
    x = 397,432,859.77/21,740.18
  6. Step 6: Final answer
    x = 18,281.03

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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.