Home / 21,918,537.46-30,251,860.05-13,218,126.58

Finding the Fourth Proportional to 21,918,537.46, 30,251,860.05 and 13,218,126.58

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Solution

The fourth proportional to 21,918,537.46, 30,251,860.05 and 13,218,126.58 is: 18,243,594.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918,537.46 : 30,251,860.05 = 13,218,126.58 : x
  2. Step 2: Convert to fraction form
    21,918,537.46/30,251,860.05 = 13,218,126.58/x
  3. Step 3: Cross multiply
    21,918,537.46x = 30,251,860.05 × 13,218,126.58
  4. Step 4: Simplify right side
    21,918,537.46x = 399,872,915,421,345.12
  5. Step 5: Solve for x
    x = 399,872,915,421,345.12/21,918,537.46
  6. Step 6: Final answer
    x = 18,243,594.77

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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.