Home / 20,931.02-28,884.30-11,977.95

Finding the Fourth Proportional to 20,931.02, 28,884.30 and 11,977.95

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Solution

The fourth proportional to 20,931.02, 28,884.30 and 11,977.95 is: 16,529.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.02 : 28,884.30 = 11,977.95 : x
  2. Step 2: Convert to fraction form
    20,931.02/28,884.30 = 11,977.95/x
  3. Step 3: Cross multiply
    20,931.02x = 28,884.30 × 11,977.95
  4. Step 4: Simplify right side
    20,931.02x = 345,974,669.49
  5. Step 5: Solve for x
    x = 345,974,669.49/20,931.02
  6. Step 6: Final answer
    x = 16,529.28

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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.