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Finding the Fourth Proportional to 28,606.89, 42,909.79 and 8,885.01

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Solution

The fourth proportional to 28,606.89, 42,909.79 and 8,885.01 is: 13,327.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,606.89 : 42,909.79 = 8,885.01 : x
  2. Step 2: Convert to fraction form
    28,606.89/42,909.79 = 8,885.01/x
  3. Step 3: Cross multiply
    28,606.89x = 42,909.79 × 8,885.01
  4. Step 4: Simplify right side
    28,606.89x = 381,253,913.25
  5. Step 5: Solve for x
    x = 381,253,913.25/28,606.89
  6. Step 6: Final answer
    x = 13,327.35

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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.