Home / 31,419.04-43,332.18-20,809.60

Finding the Fourth Proportional to 31,419.04, 43,332.18 and 20,809.60

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Solution

The fourth proportional to 31,419.04, 43,332.18 and 20,809.60 is: 28,699.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,419.04 : 43,332.18 = 20,809.60 : x
  2. Step 2: Convert to fraction form
    31,419.04/43,332.18 = 20,809.60/x
  3. Step 3: Cross multiply
    31,419.04x = 43,332.18 × 20,809.60
  4. Step 4: Simplify right side
    31,419.04x = 901,725,332.93
  5. Step 5: Solve for x
    x = 901,725,332.93/31,419.04
  6. Step 6: Final answer
    x = 28,699.96

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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.