Home / 39,386.40-54,422.40-31,493.76

Finding the Fourth Proportional to 39,386.40, 54,422.40 and 31,493.76

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Solution

The fourth proportional to 39,386.40, 54,422.40 and 31,493.76 is: 43,516.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,386.40 : 54,422.40 = 31,493.76 : x
  2. Step 2: Convert to fraction form
    39,386.40/54,422.40 = 31,493.76/x
  3. Step 3: Cross multiply
    39,386.40x = 54,422.40 × 31,493.76
  4. Step 4: Simplify right side
    39,386.40x = 1,713,966,004.22
  5. Step 5: Solve for x
    x = 1,713,966,004.22/39,386.40
  6. Step 6: Final answer
    x = 43,516.70

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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.