Home / 18,987.60-28,482.20-6,516.21

Finding the Fourth Proportional to 18,987.60, 28,482.20 and 6,516.21

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Solution

The fourth proportional to 18,987.60, 28,482.20 and 6,516.21 is: 9,774.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.60 : 28,482.20 = 6,516.21 : x
  2. Step 2: Convert to fraction form
    18,987.60/28,482.20 = 6,516.21/x
  3. Step 3: Cross multiply
    18,987.60x = 28,482.20 × 6,516.21
  4. Step 4: Simplify right side
    18,987.60x = 185,595,996.46
  5. Step 5: Solve for x
    x = 185,595,996.46/18,987.60
  6. Step 6: Final answer
    x = 9,774.59

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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.