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Finding the Fourth Proportional to 13,090.88, 18,070.68 and 8,901.68

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Solution

The fourth proportional to 13,090.88, 18,070.68 and 8,901.68 is: 12,287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.88 : 18,070.68 = 8,901.68 : x
  2. Step 2: Convert to fraction form
    13,090.88/18,070.68 = 8,901.68/x
  3. Step 3: Cross multiply
    13,090.88x = 18,070.68 × 8,901.68
  4. Step 4: Simplify right side
    13,090.88x = 160,859,410.74
  5. Step 5: Solve for x
    x = 160,859,410.74/13,090.88
  6. Step 6: Final answer
    x = 12,287.90

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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.