Home / 21,767.11-30,041.04-12,816.85

Finding the Fourth Proportional to 21,767.11, 30,041.04 and 12,816.85

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Solution

The fourth proportional to 21,767.11, 30,041.04 and 12,816.85 is: 17,688.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,767.11 : 30,041.04 = 12,816.85 : x
  2. Step 2: Convert to fraction form
    21,767.11/30,041.04 = 12,816.85/x
  3. Step 3: Cross multiply
    21,767.11x = 30,041.04 × 12,816.85
  4. Step 4: Simplify right side
    21,767.11x = 385,031,503.52
  5. Step 5: Solve for x
    x = 385,031,503.52/21,767.11
  6. Step 6: Final answer
    x = 17,688.68

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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.