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Finding the Fourth Proportional to 12,603.13, 17,392.31 and 7,015.45

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Solution

The fourth proportional to 12,603.13, 17,392.31 and 7,015.45 is: 9,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.13 : 17,392.31 = 7,015.45 : x
  2. Step 2: Convert to fraction form
    12,603.13/17,392.31 = 7,015.45/x
  3. Step 3: Cross multiply
    12,603.13x = 17,392.31 × 7,015.45
  4. Step 4: Simplify right side
    12,603.13x = 122,014,811.77
  5. Step 5: Solve for x
    x = 122,014,811.77/12,603.13
  6. Step 6: Final answer
    x = 9,681.31

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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.