Home / 25,831.80-38,747.70-19,999.80

Finding the Fourth Proportional to 25,831.80, 38,747.70 and 19,999.80

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Solution

The fourth proportional to 25,831.80, 38,747.70 and 19,999.80 is: 29,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,831.80 : 38,747.70 = 19,999.80 : x
  2. Step 2: Convert to fraction form
    25,831.80/38,747.70 = 19,999.80/x
  3. Step 3: Cross multiply
    25,831.80x = 38,747.70 × 19,999.80
  4. Step 4: Simplify right side
    25,831.80x = 774,946,250.46
  5. Step 5: Solve for x
    x = 774,946,250.46/25,831.80
  6. Step 6: Final answer
    x = 29,999.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.