Home / 15,278.84-21,083.70-8,564.42

Finding the Fourth Proportional to 15,278.84, 21,083.70 and 8,564.42

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Solution

The fourth proportional to 15,278.84, 21,083.70 and 8,564.42 is: 11,818.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.84 : 21,083.70 = 8,564.42 : x
  2. Step 2: Convert to fraction form
    15,278.84/21,083.70 = 8,564.42/x
  3. Step 3: Cross multiply
    15,278.84x = 21,083.70 × 8,564.42
  4. Step 4: Simplify right side
    15,278.84x = 180,569,661.95
  5. Step 5: Solve for x
    x = 180,569,661.95/15,278.84
  6. Step 6: Final answer
    x = 11,818.28

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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.