Home / 18,681.24-28,021.86-12,820.08

Finding the Fourth Proportional to 18,681.24, 28,021.86 and 12,820.08

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Solution

The fourth proportional to 18,681.24, 28,021.86 and 12,820.08 is: 19,230.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.24 : 28,021.86 = 12,820.08 : x
  2. Step 2: Convert to fraction form
    18,681.24/28,021.86 = 12,820.08/x
  3. Step 3: Cross multiply
    18,681.24x = 28,021.86 × 12,820.08
  4. Step 4: Simplify right side
    18,681.24x = 359,242,486.95
  5. Step 5: Solve for x
    x = 359,242,486.95/18,681.24
  6. Step 6: Final answer
    x = 19,230.12

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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.