Home / 31,669.61-47,409.75-19,151.78

Finding the Fourth Proportional to 31,669.61, 47,409.75 and 19,151.78

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Solution

The fourth proportional to 31,669.61, 47,409.75 and 19,151.78 is: 28,670.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,669.61 : 47,409.75 = 19,151.78 : x
  2. Step 2: Convert to fraction form
    31,669.61/47,409.75 = 19,151.78/x
  3. Step 3: Cross multiply
    31,669.61x = 47,409.75 × 19,151.78
  4. Step 4: Simplify right side
    31,669.61x = 907,980,864.81
  5. Step 5: Solve for x
    x = 907,980,864.81/31,669.61
  6. Step 6: Final answer
    x = 28,670.42

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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.