Home / 31,157.13-42,990.27-19,822.50

Finding the Fourth Proportional to 31,157.13, 42,990.27 and 19,822.50

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Solution

The fourth proportional to 31,157.13, 42,990.27 and 19,822.50 is: 27,350.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,157.13 : 42,990.27 = 19,822.50 : x
  2. Step 2: Convert to fraction form
    31,157.13/42,990.27 = 19,822.50/x
  3. Step 3: Cross multiply
    31,157.13x = 42,990.27 × 19,822.50
  4. Step 4: Simplify right side
    31,157.13x = 852,174,627.08
  5. Step 5: Solve for x
    x = 852,174,627.08/31,157.13
  6. Step 6: Final answer
    x = 27,350.87

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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.