Home / 18,988.24-28,486.37-7,142.13

Finding the Fourth Proportional to 18,988.24, 28,486.37 and 7,142.13

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Solution

The fourth proportional to 18,988.24, 28,486.37 and 7,142.13 is: 10,714.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.24 : 28,486.37 = 7,142.13 : x
  2. Step 2: Convert to fraction form
    18,988.24/28,486.37 = 7,142.13/x
  3. Step 3: Cross multiply
    18,988.24x = 28,486.37 × 7,142.13
  4. Step 4: Simplify right side
    18,988.24x = 203,453,357.77
  5. Step 5: Solve for x
    x = 203,453,357.77/18,988.24
  6. Step 6: Final answer
    x = 10,714.70

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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.