Home / 15,711.45-21,681.72-8,541.42

Finding the Fourth Proportional to 15,711.45, 21,681.72 and 8,541.42

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Solution

The fourth proportional to 15,711.45, 21,681.72 and 8,541.42 is: 11,787.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.45 : 21,681.72 = 8,541.42 : x
  2. Step 2: Convert to fraction form
    15,711.45/21,681.72 = 8,541.42/x
  3. Step 3: Cross multiply
    15,711.45x = 21,681.72 × 8,541.42
  4. Step 4: Simplify right side
    15,711.45x = 185,192,676.84
  5. Step 5: Solve for x
    x = 185,192,676.84/15,711.45
  6. Step 6: Final answer
    x = 11,787.12

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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.