Home / 15,856.80-21,882.12-8,783.52

Finding the Fourth Proportional to 15,856.80, 21,882.12 and 8,783.52

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Solution

The fourth proportional to 15,856.80, 21,882.12 and 8,783.52 is: 12,121.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.80 : 21,882.12 = 8,783.52 : x
  2. Step 2: Convert to fraction form
    15,856.80/21,882.12 = 8,783.52/x
  3. Step 3: Cross multiply
    15,856.80x = 21,882.12 × 8,783.52
  4. Step 4: Simplify right side
    15,856.80x = 192,202,038.66
  5. Step 5: Solve for x
    x = 192,202,038.66/15,856.80
  6. Step 6: Final answer
    x = 12,121.11

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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.