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Finding the Fourth Proportional to 10,866.60, 14,998.10 and 7,090.38

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Solution

The fourth proportional to 10,866.60, 14,998.10 and 7,090.38 is: 9,786.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.60 : 14,998.10 = 7,090.38 : x
  2. Step 2: Convert to fraction form
    10,866.60/14,998.10 = 7,090.38/x
  3. Step 3: Cross multiply
    10,866.60x = 14,998.10 × 7,090.38
  4. Step 4: Simplify right side
    10,866.60x = 106,342,192.83
  5. Step 5: Solve for x
    x = 106,342,192.83/10,866.60
  6. Step 6: Final answer
    x = 9,786.15

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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.