Home / 39,904.92-55,090.98-31,390.20

Finding the Fourth Proportional to 39,904.92, 55,090.98 and 31,390.20

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Solution

The fourth proportional to 39,904.92, 55,090.98 and 31,390.20 is: 43,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.92 : 55,090.98 = 31,390.20 : x
  2. Step 2: Convert to fraction form
    39,904.92/55,090.98 = 31,390.20/x
  3. Step 3: Cross multiply
    39,904.92x = 55,090.98 × 31,390.20
  4. Step 4: Simplify right side
    39,904.92x = 1,729,316,880.40
  5. Step 5: Solve for x
    x = 1,729,316,880.40/39,904.92
  6. Step 6: Final answer
    x = 43,335.93

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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.