Home / 31,388.39-47,045.66-12,643.39

Finding the Fourth Proportional to 31,388.39, 47,045.66 and 12,643.39

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Solution

The fourth proportional to 31,388.39, 47,045.66 and 12,643.39 is: 18,950.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,388.39 : 47,045.66 = 12,643.39 : x
  2. Step 2: Convert to fraction form
    31,388.39/47,045.66 = 12,643.39/x
  3. Step 3: Cross multiply
    31,388.39x = 47,045.66 × 12,643.39
  4. Step 4: Simplify right side
    31,388.39x = 594,816,693.90
  5. Step 5: Solve for x
    x = 594,816,693.90/31,388.39
  6. Step 6: Final answer
    x = 18,950.22

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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.