Home / 31,547.72-43,513.52-20,220.42

Finding the Fourth Proportional to 31,547.72, 43,513.52 and 20,220.42

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Solution

The fourth proportional to 31,547.72, 43,513.52 and 20,220.42 is: 27,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,547.72 : 43,513.52 = 20,220.42 : x
  2. Step 2: Convert to fraction form
    31,547.72/43,513.52 = 20,220.42/x
  3. Step 3: Cross multiply
    31,547.72x = 43,513.52 × 20,220.42
  4. Step 4: Simplify right side
    31,547.72x = 879,861,548.98
  5. Step 5: Solve for x
    x = 879,861,548.98/31,547.72
  6. Step 6: Final answer
    x = 27,889.87

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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.