Home / 31,736.64-43,776.65-20,420.84

Finding the Fourth Proportional to 31,736.64, 43,776.65 and 20,420.84

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Solution

The fourth proportional to 31,736.64, 43,776.65 and 20,420.84 is: 28,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,736.64 : 43,776.65 = 20,420.84 : x
  2. Step 2: Convert to fraction form
    31,736.64/43,776.65 = 20,420.84/x
  3. Step 3: Cross multiply
    31,736.64x = 43,776.65 × 20,420.84
  4. Step 4: Simplify right side
    31,736.64x = 893,956,125.88
  5. Step 5: Solve for x
    x = 893,956,125.88/31,736.64
  6. Step 6: Final answer
    x = 28,167.95

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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.