Home / 19,860.30-27,406.35-11,900.70

Finding the Fourth Proportional to 19,860.30, 27,406.35 and 11,900.70

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Solution

The fourth proportional to 19,860.30, 27,406.35 and 11,900.70 is: 16,422.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,860.30 : 27,406.35 = 11,900.70 : x
  2. Step 2: Convert to fraction form
    19,860.30/27,406.35 = 11,900.70/x
  3. Step 3: Cross multiply
    19,860.30x = 27,406.35 × 11,900.70
  4. Step 4: Simplify right side
    19,860.30x = 326,154,749.45
  5. Step 5: Solve for x
    x = 326,154,749.45/19,860.30
  6. Step 6: Final answer
    x = 16,422.45

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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.