Home / 18,987.35-28,456.25-13,740.03

Finding the Fourth Proportional to 18,987.35, 28,456.25 and 13,740.03

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Solution

The fourth proportional to 18,987.35, 28,456.25 and 13,740.03 is: 20,592.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.35 : 28,456.25 = 13,740.03 : x
  2. Step 2: Convert to fraction form
    18,987.35/28,456.25 = 13,740.03/x
  3. Step 3: Cross multiply
    18,987.35x = 28,456.25 × 13,740.03
  4. Step 4: Simplify right side
    18,987.35x = 390,989,659.99
  5. Step 5: Solve for x
    x = 390,989,659.99/18,987.35
  6. Step 6: Final answer
    x = 20,592.12

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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.