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Finding the Fourth Proportional to 12,698.48, 17,526.30 and 7,979.42

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Solution

The fourth proportional to 12,698.48, 17,526.30 and 7,979.42 is: 11,013.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,698.48 : 17,526.30 = 7,979.42 : x
  2. Step 2: Convert to fraction form
    12,698.48/17,526.30 = 7,979.42/x
  3. Step 3: Cross multiply
    12,698.48x = 17,526.30 × 7,979.42
  4. Step 4: Simplify right side
    12,698.48x = 139,849,708.75
  5. Step 5: Solve for x
    x = 139,849,708.75/12,698.48
  6. Step 6: Final answer
    x = 11,013.11

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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.