Home / 28,871.80-39,841.94-18,122.40

Finding the Fourth Proportional to 28,871.80, 39,841.94 and 18,122.40

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Solution

The fourth proportional to 28,871.80, 39,841.94 and 18,122.40 is: 25,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.80 : 39,841.94 = 18,122.40 : x
  2. Step 2: Convert to fraction form
    28,871.80/39,841.94 = 18,122.40/x
  3. Step 3: Cross multiply
    28,871.80x = 39,841.94 × 18,122.40
  4. Step 4: Simplify right side
    28,871.80x = 722,031,573.46
  5. Step 5: Solve for x
    x = 722,031,573.46/28,871.80
  6. Step 6: Final answer
    x = 25,008.19

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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.