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Finding the Fourth Proportional to 10,412.88, 15,602.88 and 8,455.56

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Solution

The fourth proportional to 10,412.88, 15,602.88 and 8,455.56 is: 12,669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,412.88 : 15,602.88 = 8,455.56 : x
  2. Step 2: Convert to fraction form
    10,412.88/15,602.88 = 8,455.56/x
  3. Step 3: Cross multiply
    10,412.88x = 15,602.88 × 8,455.56
  4. Step 4: Simplify right side
    10,412.88x = 131,931,088.01
  5. Step 5: Solve for x
    x = 131,931,088.01/10,412.88
  6. Step 6: Final answer
    x = 12,669.99

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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.