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Finding the Fourth Proportional to 10,807.60, 16,211.40 and 8,985.10

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Solution

The fourth proportional to 10,807.60, 16,211.40 and 8,985.10 is: 13,477.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,807.60 : 16,211.40 = 8,985.10 : x
  2. Step 2: Convert to fraction form
    10,807.60/16,211.40 = 8,985.10/x
  3. Step 3: Cross multiply
    10,807.60x = 16,211.40 × 8,985.10
  4. Step 4: Simplify right side
    10,807.60x = 145,661,050.14
  5. Step 5: Solve for x
    x = 145,661,050.14/10,807.60
  6. Step 6: Final answer
    x = 13,477.65

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Similar ratio
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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.