Home / 20,408.51-28,156.50-13,339.01

Finding the Fourth Proportional to 20,408.51, 28,156.50 and 13,339.01

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Solution

The fourth proportional to 20,408.51, 28,156.50 and 13,339.01 is: 18,403.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.51 : 28,156.50 = 13,339.01 : x
  2. Step 2: Convert to fraction form
    20,408.51/28,156.50 = 13,339.01/x
  3. Step 3: Cross multiply
    20,408.51x = 28,156.50 × 13,339.01
  4. Step 4: Simplify right side
    20,408.51x = 375,579,694.28
  5. Step 5: Solve for x
    x = 375,579,694.28/20,408.51
  6. Step 6: Final answer
    x = 18,403.10

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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.