Home / 27,909.12-38,485.62-19,420.86

Finding the Fourth Proportional to 27,909.12, 38,485.62 and 19,420.86

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Solution

The fourth proportional to 27,909.12, 38,485.62 and 19,420.86 is: 26,780.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,909.12 : 38,485.62 = 19,420.86 : x
  2. Step 2: Convert to fraction form
    27,909.12/38,485.62 = 19,420.86/x
  3. Step 3: Cross multiply
    27,909.12x = 38,485.62 × 19,420.86
  4. Step 4: Simplify right side
    27,909.12x = 747,423,838.03
  5. Step 5: Solve for x
    x = 747,423,838.03/27,909.12
  6. Step 6: Final answer
    x = 26,780.63

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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.