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Finding the Fourth Proportional to 12,899.99, 17,802.18 and 7,235.99

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Solution

The fourth proportional to 12,899.99, 17,802.18 and 7,235.99 is: 9,985.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,899.99 : 17,802.18 = 7,235.99 : x
  2. Step 2: Convert to fraction form
    12,899.99/17,802.18 = 7,235.99/x
  3. Step 3: Cross multiply
    12,899.99x = 17,802.18 × 7,235.99
  4. Step 4: Simplify right side
    12,899.99x = 128,816,360.28
  5. Step 5: Solve for x
    x = 128,816,360.28/12,899.99
  6. Step 6: Final answer
    x = 9,985.78

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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.