Home / 21,080.28-29,050.79-15,101.57

Finding the Fourth Proportional to 21,080.28, 29,050.79 and 15,101.57

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Solution

The fourth proportional to 21,080.28, 29,050.79 and 15,101.57 is: 20,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.28 : 29,050.79 = 15,101.57 : x
  2. Step 2: Convert to fraction form
    21,080.28/29,050.79 = 15,101.57/x
  3. Step 3: Cross multiply
    21,080.28x = 29,050.79 × 15,101.57
  4. Step 4: Simplify right side
    21,080.28x = 438,712,535.86
  5. Step 5: Solve for x
    x = 438,712,535.86/21,080.28
  6. Step 6: Final answer
    x = 20,811.51

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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.