Home / 15,400.31-21,249.69-8,686.22

Finding the Fourth Proportional to 15,400.31, 21,249.69 and 8,686.22

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Solution

The fourth proportional to 15,400.31, 21,249.69 and 8,686.22 is: 11,985.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.31 : 21,249.69 = 8,686.22 : x
  2. Step 2: Convert to fraction form
    15,400.31/21,249.69 = 8,686.22/x
  3. Step 3: Cross multiply
    15,400.31x = 21,249.69 × 8,686.22
  4. Step 4: Simplify right side
    15,400.31x = 184,579,482.27
  5. Step 5: Solve for x
    x = 184,579,482.27/15,400.31
  6. Step 6: Final answer
    x = 11,985.44

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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.