Home / 20,972.11-28,941.57-11,412.00

Finding the Fourth Proportional to 20,972.11, 28,941.57 and 11,412.00

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Solution

The fourth proportional to 20,972.11, 28,941.57 and 11,412.00 is: 15,748.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.11 : 28,941.57 = 11,412.00 : x
  2. Step 2: Convert to fraction form
    20,972.11/28,941.57 = 11,412.00/x
  3. Step 3: Cross multiply
    20,972.11x = 28,941.57 × 11,412.00
  4. Step 4: Simplify right side
    20,972.11x = 330,281,106.20
  5. Step 5: Solve for x
    x = 330,281,106.20/20,972.11
  6. Step 6: Final answer
    x = 15,748.59

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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.