Home / 20,281.12-27,988.24-11,897.76

Finding the Fourth Proportional to 20,281.12, 27,988.24 and 11,897.76

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Solution

The fourth proportional to 20,281.12, 27,988.24 and 11,897.76 is: 16,419.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.12 : 27,988.24 = 11,897.76 : x
  2. Step 2: Convert to fraction form
    20,281.12/27,988.24 = 11,897.76/x
  3. Step 3: Cross multiply
    20,281.12x = 27,988.24 × 11,897.76
  4. Step 4: Simplify right side
    20,281.12x = 332,997,362.34
  5. Step 5: Solve for x
    x = 332,997,362.34/20,281.12
  6. Step 6: Final answer
    x = 16,419.08

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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.