Home / 28,385.37-42,378.48-21,686.81

Finding the Fourth Proportional to 28,385.37, 42,378.48 and 21,686.81

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Solution

The fourth proportional to 28,385.37, 42,378.48 and 21,686.81 is: 32,377.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.37 : 42,378.48 = 21,686.81 : x
  2. Step 2: Convert to fraction form
    28,385.37/42,378.48 = 21,686.81/x
  3. Step 3: Cross multiply
    28,385.37x = 42,378.48 × 21,686.81
  4. Step 4: Simplify right side
    28,385.37x = 919,053,831.96
  5. Step 5: Solve for x
    x = 919,053,831.96/28,385.37
  6. Step 6: Final answer
    x = 32,377.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.