Home / 13,862.09-20,780.71-5,090.87

Finding the Fourth Proportional to 13,862.09, 20,780.71 and 5,090.87

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Solution

The fourth proportional to 13,862.09, 20,780.71 and 5,090.87 is: 7,631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.09 : 20,780.71 = 5,090.87 : x
  2. Step 2: Convert to fraction form
    13,862.09/20,780.71 = 5,090.87/x
  3. Step 3: Cross multiply
    13,862.09x = 20,780.71 × 5,090.87
  4. Step 4: Simplify right side
    13,862.09x = 105,791,932.34
  5. Step 5: Solve for x
    x = 105,791,932.34/13,862.09
  6. Step 6: Final answer
    x = 7,631.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.