Home / 15,635.10-21,575.79-8,561.40

Finding the Fourth Proportional to 15,635.10, 21,575.79 and 8,561.40

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Solution

The fourth proportional to 15,635.10, 21,575.79 and 8,561.40 is: 11,814.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.10 : 21,575.79 = 8,561.40 : x
  2. Step 2: Convert to fraction form
    15,635.10/21,575.79 = 8,561.40/x
  3. Step 3: Cross multiply
    15,635.10x = 21,575.79 × 8,561.40
  4. Step 4: Simplify right side
    15,635.10x = 184,718,968.51
  5. Step 5: Solve for x
    x = 184,718,968.51/15,635.10
  6. Step 6: Final answer
    x = 11,814.38

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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.