Home / 31,780.32-47,673.28-11,790.04

Finding the Fourth Proportional to 31,780.32, 47,673.28 and 11,790.04

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Solution

The fourth proportional to 31,780.32, 47,673.28 and 11,790.04 is: 17,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.32 : 47,673.28 = 11,790.04 : x
  2. Step 2: Convert to fraction form
    31,780.32/47,673.28 = 11,790.04/x
  3. Step 3: Cross multiply
    31,780.32x = 47,673.28 × 11,790.04
  4. Step 4: Simplify right side
    31,780.32x = 562,069,796.75
  5. Step 5: Solve for x
    x = 562,069,796.75/31,780.32
  6. Step 6: Final answer
    x = 17,686.10

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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.