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Finding the Fourth Proportional to 8,985.86, 13,460.94 and 7,140.14

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Solution

The fourth proportional to 8,985.86, 13,460.94 and 7,140.14 is: 10,696.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.86 : 13,460.94 = 7,140.14 : x
  2. Step 2: Convert to fraction form
    8,985.86/13,460.94 = 7,140.14/x
  3. Step 3: Cross multiply
    8,985.86x = 13,460.94 × 7,140.14
  4. Step 4: Simplify right side
    8,985.86x = 96,112,996.13
  5. Step 5: Solve for x
    x = 96,112,996.13/8,985.86
  6. Step 6: Final answer
    x = 10,696.03

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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.