Home / 19,720.32-27,225.12-13,679.36

Finding the Fourth Proportional to 19,720.32, 27,225.12 and 13,679.36

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Solution

The fourth proportional to 19,720.32, 27,225.12 and 13,679.36 is: 18,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.32 : 27,225.12 = 13,679.36 : x
  2. Step 2: Convert to fraction form
    19,720.32/27,225.12 = 13,679.36/x
  3. Step 3: Cross multiply
    19,720.32x = 27,225.12 × 13,679.36
  4. Step 4: Simplify right side
    19,720.32x = 372,422,217.52
  5. Step 5: Solve for x
    x = 372,422,217.52/19,720.32
  6. Step 6: Final answer
    x = 18,885.20

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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.