Home / 18,985.49-28,472.31-13,703.88

Finding the Fourth Proportional to 18,985.49, 28,472.31 and 13,703.88

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Solution

The fourth proportional to 18,985.49, 28,472.31 and 13,703.88 is: 20,551.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.49 : 28,472.31 = 13,703.88 : x
  2. Step 2: Convert to fraction form
    18,985.49/28,472.31 = 13,703.88/x
  3. Step 3: Cross multiply
    18,985.49x = 28,472.31 × 13,703.88
  4. Step 4: Simplify right side
    18,985.49x = 390,181,226.33
  5. Step 5: Solve for x
    x = 390,181,226.33/18,985.49
  6. Step 6: Final answer
    x = 20,551.55

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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.