Home / 20,624.40-31,068-18,831.06

Finding the Fourth Proportional to 20,624.40, 31,068 and 18,831.06

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Solution

The fourth proportional to 20,624.40, 31,068 and 18,831.06 is: 28,366.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,624.40 : 31,068 = 18,831.06 : x
  2. Step 2: Convert to fraction form
    20,624.40/31,068 = 18,831.06/x
  3. Step 3: Cross multiply
    20,624.40x = 31,068 × 18,831.06
  4. Step 4: Simplify right side
    20,624.40x = 585,043,372.08
  5. Step 5: Solve for x
    x = 585,043,372.08/20,624.40
  6. Step 6: Final answer
    x = 28,366.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.