Home / 20,901.81-28,868.45-13,763.63

Finding the Fourth Proportional to 20,901.81, 28,868.45 and 13,763.63

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Solution

The fourth proportional to 20,901.81, 28,868.45 and 13,763.63 is: 19,009.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.81 : 28,868.45 = 13,763.63 : x
  2. Step 2: Convert to fraction form
    20,901.81/28,868.45 = 13,763.63/x
  3. Step 3: Cross multiply
    20,901.81x = 28,868.45 × 13,763.63
  4. Step 4: Simplify right side
    20,901.81x = 397,334,706.54
  5. Step 5: Solve for x
    x = 397,334,706.54/20,901.81
  6. Step 6: Final answer
    x = 19,009.59

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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.