Home / 22,140.81-30,554.89-12,711.20

Finding the Fourth Proportional to 22,140.81, 30,554.89 and 12,711.20

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Solution

The fourth proportional to 22,140.81, 30,554.89 and 12,711.20 is: 17,541.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,140.81 : 30,554.89 = 12,711.20 : x
  2. Step 2: Convert to fraction form
    22,140.81/30,554.89 = 12,711.20/x
  3. Step 3: Cross multiply
    22,140.81x = 30,554.89 × 12,711.20
  4. Step 4: Simplify right side
    22,140.81x = 388,389,133.22
  5. Step 5: Solve for x
    x = 388,389,133.22/22,140.81
  6. Step 6: Final answer
    x = 17,541.78

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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.