Home / 20,045.79-27,685.93-13,661.45

Finding the Fourth Proportional to 20,045.79, 27,685.93 and 13,661.45

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Solution

The fourth proportional to 20,045.79, 27,685.93 and 13,661.45 is: 18,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,045.79 : 27,685.93 = 13,661.45 : x
  2. Step 2: Convert to fraction form
    20,045.79/27,685.93 = 13,661.45/x
  3. Step 3: Cross multiply
    20,045.79x = 27,685.93 × 13,661.45
  4. Step 4: Simplify right side
    20,045.79x = 378,229,948.40
  5. Step 5: Solve for x
    x = 378,229,948.40/20,045.79
  6. Step 6: Final answer
    x = 18,868.30

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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.