Home / 31,871.04-47,781.36-13,140.24

Finding the Fourth Proportional to 31,871.04, 47,781.36 and 13,140.24

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Solution

The fourth proportional to 31,871.04, 47,781.36 and 13,140.24 is: 19,699.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,871.04 : 47,781.36 = 13,140.24 : x
  2. Step 2: Convert to fraction form
    31,871.04/47,781.36 = 13,140.24/x
  3. Step 3: Cross multiply
    31,871.04x = 47,781.36 × 13,140.24
  4. Step 4: Simplify right side
    31,871.04x = 627,858,537.93
  5. Step 5: Solve for x
    x = 627,858,537.93/31,871.04
  6. Step 6: Final answer
    x = 19,699.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.