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Finding the Fourth Proportional to 12,888.70, 17,794.98 and 9,899.19

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Solution

The fourth proportional to 12,888.70, 17,794.98 and 9,899.19 is: 13,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.70 : 17,794.98 = 9,899.19 : x
  2. Step 2: Convert to fraction form
    12,888.70/17,794.98 = 9,899.19/x
  3. Step 3: Cross multiply
    12,888.70x = 17,794.98 × 9,899.19
  4. Step 4: Simplify right side
    12,888.70x = 176,155,838.57
  5. Step 5: Solve for x
    x = 176,155,838.57/12,888.70
  6. Step 6: Final answer
    x = 13,667.46

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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.