Home / 42,390.21-63,585.89-12,808.29

Finding the Fourth Proportional to 42,390.21, 63,585.89 and 12,808.29

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Solution

The fourth proportional to 42,390.21, 63,585.89 and 12,808.29 is: 19,212.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390.21 : 63,585.89 = 12,808.29 : x
  2. Step 2: Convert to fraction form
    42,390.21/63,585.89 = 12,808.29/x
  3. Step 3: Cross multiply
    42,390.21x = 63,585.89 × 12,808.29
  4. Step 4: Simplify right side
    42,390.21x = 814,426,454.99
  5. Step 5: Solve for x
    x = 814,426,454.99/42,390.21
  6. Step 6: Final answer
    x = 19,212.61

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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.