Home / 15,849.47-21,870.30-8,775.95

Finding the Fourth Proportional to 15,849.47, 21,870.30 and 8,775.95

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Solution

The fourth proportional to 15,849.47, 21,870.30 and 8,775.95 is: 12,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,849.47 : 21,870.30 = 8,775.95 : x
  2. Step 2: Convert to fraction form
    15,849.47/21,870.30 = 8,775.95/x
  3. Step 3: Cross multiply
    15,849.47x = 21,870.30 × 8,775.95
  4. Step 4: Simplify right side
    15,849.47x = 191,932,582.84
  5. Step 5: Solve for x
    x = 191,932,582.84/15,849.47
  6. Step 6: Final answer
    x = 12,109.71

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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.