Home / 27,985.12-38,619.60-15,409.84

Finding the Fourth Proportional to 27,985.12, 38,619.60 and 15,409.84

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Solution

The fourth proportional to 27,985.12, 38,619.60 and 15,409.84 is: 21,265.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,985.12 : 38,619.60 = 15,409.84 : x
  2. Step 2: Convert to fraction form
    27,985.12/38,619.60 = 15,409.84/x
  3. Step 3: Cross multiply
    27,985.12x = 38,619.60 × 15,409.84
  4. Step 4: Simplify right side
    27,985.12x = 595,121,856.86
  5. Step 5: Solve for x
    x = 595,121,856.86/27,985.12
  6. Step 6: Final answer
    x = 21,265.65

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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.