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Finding the Fourth Proportional to 17,118.80, 25,681.80 and 9,717.20

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Solution

The fourth proportional to 17,118.80, 25,681.80 and 9,717.20 is: 14,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,118.80 : 25,681.80 = 9,717.20 : x
  2. Step 2: Convert to fraction form
    17,118.80/25,681.80 = 9,717.20/x
  3. Step 3: Cross multiply
    17,118.80x = 25,681.80 × 9,717.20
  4. Step 4: Simplify right side
    17,118.80x = 249,555,186.96
  5. Step 5: Solve for x
    x = 249,555,186.96/17,118.80
  6. Step 6: Final answer
    x = 14,577.84

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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.