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Finding the Fourth Proportional to 10,863.98, 14,985.18 and 8,622.32

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Solution

The fourth proportional to 10,863.98, 14,985.18 and 8,622.32 is: 11,893.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,863.98 : 14,985.18 = 8,622.32 : x
  2. Step 2: Convert to fraction form
    10,863.98/14,985.18 = 8,622.32/x
  3. Step 3: Cross multiply
    10,863.98x = 14,985.18 × 8,622.32
  4. Step 4: Simplify right side
    10,863.98x = 129,207,017.22
  5. Step 5: Solve for x
    x = 129,207,017.22/10,863.98
  6. Step 6: Final answer
    x = 11,893.16

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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.