Home / 31,864.66-43,931.91-20,513.86

Finding the Fourth Proportional to 31,864.66, 43,931.91 and 20,513.86

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Solution

The fourth proportional to 31,864.66, 43,931.91 and 20,513.86 is: 28,282.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,864.66 : 43,931.91 = 20,513.86 : x
  2. Step 2: Convert to fraction form
    31,864.66/43,931.91 = 20,513.86/x
  3. Step 3: Cross multiply
    31,864.66x = 43,931.91 × 20,513.86
  4. Step 4: Simplify right side
    31,864.66x = 901,213,051.27
  5. Step 5: Solve for x
    x = 901,213,051.27/31,864.66
  6. Step 6: Final answer
    x = 28,282.53

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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.