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Finding the Fourth Proportional to 43,008.80, 64,513.20 and 11,418.80

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Solution

The fourth proportional to 43,008.80, 64,513.20 and 11,418.80 is: 17,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,008.80 : 64,513.20 = 11,418.80 : x
  2. Step 2: Convert to fraction form
    43,008.80/64,513.20 = 11,418.80/x
  3. Step 3: Cross multiply
    43,008.80x = 64,513.20 × 11,418.80
  4. Step 4: Simplify right side
    43,008.80x = 736,663,328.16
  5. Step 5: Solve for x
    x = 736,663,328.16/43,008.80
  6. Step 6: Final answer
    x = 17,128.20

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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.