Home / 20,938.71-28,897.34-11,989.11

Finding the Fourth Proportional to 20,938.71, 28,897.34 and 11,989.11

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Solution

The fourth proportional to 20,938.71, 28,897.34 and 11,989.11 is: 16,546.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.71 : 28,897.34 = 11,989.11 : x
  2. Step 2: Convert to fraction form
    20,938.71/28,897.34 = 11,989.11/x
  3. Step 3: Cross multiply
    20,938.71x = 28,897.34 × 11,989.11
  4. Step 4: Simplify right side
    20,938.71x = 346,453,328.02
  5. Step 5: Solve for x
    x = 346,453,328.02/20,938.71
  6. Step 6: Final answer
    x = 16,546.07

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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.