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Finding the Fourth Proportional to 17,128.70, 25,665.45 and 9,711.10

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Solution

The fourth proportional to 17,128.70, 25,665.45 and 9,711.10 is: 14,551.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.70 : 25,665.45 = 9,711.10 : x
  2. Step 2: Convert to fraction form
    17,128.70/25,665.45 = 9,711.10/x
  3. Step 3: Cross multiply
    17,128.70x = 25,665.45 × 9,711.10
  4. Step 4: Simplify right side
    17,128.70x = 249,239,751.50
  5. Step 5: Solve for x
    x = 249,239,751.50/17,128.70
  6. Step 6: Final answer
    x = 14,551.00

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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.