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Finding the Fourth Proportional to 15,838.56, 21,856.91 and 8,765.03

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Solution

The fourth proportional to 15,838.56, 21,856.91 and 8,765.03 is: 12,095.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,838.56 : 21,856.91 = 8,765.03 : x
  2. Step 2: Convert to fraction form
    15,838.56/21,856.91 = 8,765.03/x
  3. Step 3: Cross multiply
    15,838.56x = 21,856.91 × 8,765.03
  4. Step 4: Simplify right side
    15,838.56x = 191,576,482.67
  5. Step 5: Solve for x
    x = 191,576,482.67/15,838.56
  6. Step 6: Final answer
    x = 12,095.57

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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.