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Finding the Fourth Proportional to 12,988.15, 17,923.60 and 7,019.82

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Solution

The fourth proportional to 12,988.15, 17,923.60 and 7,019.82 is: 9,687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.15 : 17,923.60 = 7,019.82 : x
  2. Step 2: Convert to fraction form
    12,988.15/17,923.60 = 7,019.82/x
  3. Step 3: Cross multiply
    12,988.15x = 17,923.60 × 7,019.82
  4. Step 4: Simplify right side
    12,988.15x = 125,820,445.75
  5. Step 5: Solve for x
    x = 125,820,445.75/12,988.15
  6. Step 6: Final answer
    x = 9,687.33

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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.