Home / 21,012,780.69-29,002,146.35-13,272,900.21

Finding the Fourth Proportional to 21,012,780.69, 29,002,146.35 and 13,272,900.21

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Solution

The fourth proportional to 21,012,780.69, 29,002,146.35 and 13,272,900.21 is: 18,319,450.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012,780.69 : 29,002,146.35 = 13,272,900.21 : x
  2. Step 2: Convert to fraction form
    21,012,780.69/29,002,146.35 = 13,272,900.21/x
  3. Step 3: Cross multiply
    21,012,780.69x = 29,002,146.35 × 13,272,900.21
  4. Step 4: Simplify right side
    21,012,780.69x = 384,942,594,313,001.25
  5. Step 5: Solve for x
    x = 384,942,594,313,001.25/21,012,780.69
  6. Step 6: Final answer
    x = 18,319,450.43

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Double scale
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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.