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Finding the Fourth Proportional to 10,530.88, 15,783.36 and 8,586.88

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Solution

The fourth proportional to 10,530.88, 15,783.36 and 8,586.88 is: 12,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,530.88 : 15,783.36 = 8,586.88 : x
  2. Step 2: Convert to fraction form
    10,530.88/15,783.36 = 8,586.88/x
  3. Step 3: Cross multiply
    10,530.88x = 15,783.36 × 8,586.88
  4. Step 4: Simplify right side
    10,530.88x = 135,529,818.32
  5. Step 5: Solve for x
    x = 135,529,818.32/10,530.88
  6. Step 6: Final answer
    x = 12,869.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.