Home / 31,580.37-43,595.09-20,831.58

Finding the Fourth Proportional to 31,580.37, 43,595.09 and 20,831.58

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Solution

The fourth proportional to 31,580.37, 43,595.09 and 20,831.58 is: 28,756.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,580.37 : 43,595.09 = 20,831.58 : x
  2. Step 2: Convert to fraction form
    31,580.37/43,595.09 = 20,831.58/x
  3. Step 3: Cross multiply
    31,580.37x = 43,595.09 × 20,831.58
  4. Step 4: Simplify right side
    31,580.37x = 908,154,500.78
  5. Step 5: Solve for x
    x = 908,154,500.78/31,580.37
  6. Step 6: Final answer
    x = 28,756.93

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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.