Home / 31,615.79-43,650.11-20,290.16

Finding the Fourth Proportional to 31,615.79, 43,650.11 and 20,290.16

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Solution

The fourth proportional to 31,615.79, 43,650.11 and 20,290.16 is: 28,013.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.79 : 43,650.11 = 20,290.16 : x
  2. Step 2: Convert to fraction form
    31,615.79/43,650.11 = 20,290.16/x
  3. Step 3: Cross multiply
    31,615.79x = 43,650.11 × 20,290.16
  4. Step 4: Simplify right side
    31,615.79x = 885,667,875.77
  5. Step 5: Solve for x
    x = 885,667,875.77/31,615.79
  6. Step 6: Final answer
    x = 28,013.47

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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.