Home / 31,666.72-43,681.03-20,911.69

Finding the Fourth Proportional to 31,666.72, 43,681.03 and 20,911.69

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Solution

The fourth proportional to 31,666.72, 43,681.03 and 20,911.69 is: 28,845.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,666.72 : 43,681.03 = 20,911.69 : x
  2. Step 2: Convert to fraction form
    31,666.72/43,681.03 = 20,911.69/x
  3. Step 3: Cross multiply
    31,666.72x = 43,681.03 × 20,911.69
  4. Step 4: Simplify right side
    31,666.72x = 913,444,158.24
  5. Step 5: Solve for x
    x = 913,444,158.24/31,666.72
  6. Step 6: Final answer
    x = 28,845.56

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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.