Home / 31,670.28-43,730.82-20,345.40

Finding the Fourth Proportional to 31,670.28, 43,730.82 and 20,345.40

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Solution

The fourth proportional to 31,670.28, 43,730.82 and 20,345.40 is: 28,093.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,670.28 : 43,730.82 = 20,345.40 : x
  2. Step 2: Convert to fraction form
    31,670.28/43,730.82 = 20,345.40/x
  3. Step 3: Cross multiply
    31,670.28x = 43,730.82 × 20,345.40
  4. Step 4: Simplify right side
    31,670.28x = 889,721,025.23
  5. Step 5: Solve for x
    x = 889,721,025.23/31,670.28
  6. Step 6: Final answer
    x = 28,093.25

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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.