Home / 19,920.12-27,489.84-10,967.40

Finding the Fourth Proportional to 19,920.12, 27,489.84 and 10,967.40

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Solution

The fourth proportional to 19,920.12, 27,489.84 and 10,967.40 is: 15,135.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.12 : 27,489.84 = 10,967.40 : x
  2. Step 2: Convert to fraction form
    19,920.12/27,489.84 = 10,967.40/x
  3. Step 3: Cross multiply
    19,920.12x = 27,489.84 × 10,967.40
  4. Step 4: Simplify right side
    19,920.12x = 301,492,071.22
  5. Step 5: Solve for x
    x = 301,492,071.22/19,920.12
  6. Step 6: Final answer
    x = 15,135.05

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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.