Home / 18,789.42-25,931.80-10,831.70

Finding the Fourth Proportional to 18,789.42, 25,931.80 and 10,831.70

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Solution

The fourth proportional to 18,789.42, 25,931.80 and 10,831.70 is: 14,949.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.42 : 25,931.80 = 10,831.70 : x
  2. Step 2: Convert to fraction form
    18,789.42/25,931.80 = 10,831.70/x
  3. Step 3: Cross multiply
    18,789.42x = 25,931.80 × 10,831.70
  4. Step 4: Simplify right side
    18,789.42x = 280,885,478.06
  5. Step 5: Solve for x
    x = 280,885,478.06/18,789.42
  6. Step 6: Final answer
    x = 14,949.13

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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.