Home / 31,318.99-43,208.17-19,988.89

Finding the Fourth Proportional to 31,318.99, 43,208.17 and 19,988.89

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Solution

The fourth proportional to 31,318.99, 43,208.17 and 19,988.89 is: 27,576.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.99 : 43,208.17 = 19,988.89 : x
  2. Step 2: Convert to fraction form
    31,318.99/43,208.17 = 19,988.89/x
  3. Step 3: Cross multiply
    31,318.99x = 43,208.17 × 19,988.89
  4. Step 4: Simplify right side
    31,318.99x = 863,683,357.23
  5. Step 5: Solve for x
    x = 863,683,357.23/31,318.99
  6. Step 6: Final answer
    x = 27,576.99

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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.