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Finding the Fourth Proportional to 13,417.98, 18,512.51 and 7,751.99

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Solution

The fourth proportional to 13,417.98, 18,512.51 and 7,751.99 is: 10,695.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.98 : 18,512.51 = 7,751.99 : x
  2. Step 2: Convert to fraction form
    13,417.98/18,512.51 = 7,751.99/x
  3. Step 3: Cross multiply
    13,417.98x = 18,512.51 × 7,751.99
  4. Step 4: Simplify right side
    13,417.98x = 143,508,661.07
  5. Step 5: Solve for x
    x = 143,508,661.07/13,417.98
  6. Step 6: Final answer
    x = 10,695.25

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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.