Home / 31,870.32-43,982.46-18,442.20

Finding the Fourth Proportional to 31,870.32, 43,982.46 and 18,442.20

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Solution

The fourth proportional to 31,870.32, 43,982.46 and 18,442.20 is: 25,451.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,870.32 : 43,982.46 = 18,442.20 : x
  2. Step 2: Convert to fraction form
    31,870.32/43,982.46 = 18,442.20/x
  3. Step 3: Cross multiply
    31,870.32x = 43,982.46 × 18,442.20
  4. Step 4: Simplify right side
    31,870.32x = 811,133,323.81
  5. Step 5: Solve for x
    x = 811,133,323.81/31,870.32
  6. Step 6: Final answer
    x = 25,451.06

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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.