Home / 31,618.11-43,582.32-21,405.93

Finding the Fourth Proportional to 31,618.11, 43,582.32 and 21,405.93

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Solution

The fourth proportional to 31,618.11, 43,582.32 and 21,405.93 is: 29,505.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.11 : 43,582.32 = 21,405.93 : x
  2. Step 2: Convert to fraction form
    31,618.11/43,582.32 = 21,405.93/x
  3. Step 3: Cross multiply
    31,618.11x = 43,582.32 × 21,405.93
  4. Step 4: Simplify right side
    31,618.11x = 932,920,091.16
  5. Step 5: Solve for x
    x = 932,920,091.16/31,618.11
  6. Step 6: Final answer
    x = 29,505.88

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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.