Home / 31,582.31-47,373.32-12,857.90

Finding the Fourth Proportional to 31,582.31, 47,373.32 and 12,857.90

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Solution

The fourth proportional to 31,582.31, 47,373.32 and 12,857.90 is: 19,286.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,582.31 : 47,373.32 = 12,857.90 : x
  2. Step 2: Convert to fraction form
    31,582.31/47,373.32 = 12,857.90/x
  3. Step 3: Cross multiply
    31,582.31x = 47,373.32 × 12,857.90
  4. Step 4: Simplify right side
    31,582.31x = 609,121,206.51
  5. Step 5: Solve for x
    x = 609,121,206.51/31,582.31
  6. Step 6: Final answer
    x = 19,286.79

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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.