Home / 31,317.99-43,206.80-19,987.89

Finding the Fourth Proportional to 31,317.99, 43,206.80 and 19,987.89

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Solution

The fourth proportional to 31,317.99, 43,206.80 and 19,987.89 is: 27,575.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,317.99 : 43,206.80 = 19,987.89 : x
  2. Step 2: Convert to fraction form
    31,317.99/43,206.80 = 19,987.89/x
  3. Step 3: Cross multiply
    31,317.99x = 43,206.80 × 19,987.89
  4. Step 4: Simplify right side
    31,317.99x = 863,612,665.71
  5. Step 5: Solve for x
    x = 863,612,665.71/31,317.99
  6. Step 6: Final answer
    x = 27,575.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.