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Finding the Fourth Proportional to 10,865.98, 14,987.94 and 8,624.32

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Solution

The fourth proportional to 10,865.98, 14,987.94 and 8,624.32 is: 11,895.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.98 : 14,987.94 = 8,624.32 : x
  2. Step 2: Convert to fraction form
    10,865.98/14,987.94 = 8,624.32/x
  3. Step 3: Cross multiply
    10,865.98x = 14,987.94 × 8,624.32
  4. Step 4: Simplify right side
    10,865.98x = 129,260,790.70
  5. Step 5: Solve for x
    x = 129,260,790.70/10,865.98
  6. Step 6: Final answer
    x = 11,895.92

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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.