Home / 31,157.63-42,990.96-19,823

Finding the Fourth Proportional to 31,157.63, 42,990.96 and 19,823

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Solution

The fourth proportional to 31,157.63, 42,990.96 and 19,823 is: 27,351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,157.63 : 42,990.96 = 19,823 : x
  2. Step 2: Convert to fraction form
    31,157.63/42,990.96 = 19,823/x
  3. Step 3: Cross multiply
    31,157.63x = 42,990.96 × 19,823
  4. Step 4: Simplify right side
    31,157.63x = 852,209,800.08
  5. Step 5: Solve for x
    x = 852,209,800.08/31,157.63
  6. Step 6: Final answer
    x = 27,351.56

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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.