Home / 21,065.20-29,068.20-12,996.58

Finding the Fourth Proportional to 21,065.20, 29,068.20 and 12,996.58

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Solution

The fourth proportional to 21,065.20, 29,068.20 and 12,996.58 is: 17,934.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.20 : 29,068.20 = 12,996.58 : x
  2. Step 2: Convert to fraction form
    21,065.20/29,068.20 = 12,996.58/x
  3. Step 3: Cross multiply
    21,065.20x = 29,068.20 × 12,996.58
  4. Step 4: Simplify right side
    21,065.20x = 377,787,186.76
  5. Step 5: Solve for x
    x = 377,787,186.76/21,065.20
  6. Step 6: Final answer
    x = 17,934.18

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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.