Home / 31,368.81-47,016.75-11,634.78

Finding the Fourth Proportional to 31,368.81, 47,016.75 and 11,634.78

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Solution

The fourth proportional to 31,368.81, 47,016.75 and 11,634.78 is: 17,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,368.81 : 47,016.75 = 11,634.78 : x
  2. Step 2: Convert to fraction form
    31,368.81/47,016.75 = 11,634.78/x
  3. Step 3: Cross multiply
    31,368.81x = 47,016.75 × 11,634.78
  4. Step 4: Simplify right side
    31,368.81x = 547,029,762.51
  5. Step 5: Solve for x
    x = 547,029,762.51/31,368.81
  6. Step 6: Final answer
    x = 17,438.65

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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.