Home / 27,768.12-38,292.02-20,978.85

Finding the Fourth Proportional to 27,768.12, 38,292.02 and 20,978.85

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Solution

The fourth proportional to 27,768.12, 38,292.02 and 20,978.85 is: 28,929.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,768.12 : 38,292.02 = 20,978.85 : x
  2. Step 2: Convert to fraction form
    27,768.12/38,292.02 = 20,978.85/x
  3. Step 3: Cross multiply
    27,768.12x = 38,292.02 × 20,978.85
  4. Step 4: Simplify right side
    27,768.12x = 803,322,386.75
  5. Step 5: Solve for x
    x = 803,322,386.75/27,768.12
  6. Step 6: Final answer
    x = 28,929.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.