Home / 15,321.84-21,144.68-8,607.21

Finding the Fourth Proportional to 15,321.84, 21,144.68 and 8,607.21

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Solution

The fourth proportional to 15,321.84, 21,144.68 and 8,607.21 is: 11,878.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.84 : 21,144.68 = 8,607.21 : x
  2. Step 2: Convert to fraction form
    15,321.84/21,144.68 = 8,607.21/x
  3. Step 3: Cross multiply
    15,321.84x = 21,144.68 × 8,607.21
  4. Step 4: Simplify right side
    15,321.84x = 181,996,701.14
  5. Step 5: Solve for x
    x = 181,996,701.14/15,321.84
  6. Step 6: Final answer
    x = 11,878.25

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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.