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Finding the Fourth Proportional to 12,967.12, 17,894.99 and 7,931.25

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Solution

The fourth proportional to 12,967.12, 17,894.99 and 7,931.25 is: 10,945.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,967.12 : 17,894.99 = 7,931.25 : x
  2. Step 2: Convert to fraction form
    12,967.12/17,894.99 = 7,931.25/x
  3. Step 3: Cross multiply
    12,967.12x = 17,894.99 × 7,931.25
  4. Step 4: Simplify right side
    12,967.12x = 141,929,639.44
  5. Step 5: Solve for x
    x = 141,929,639.44/12,967.12
  6. Step 6: Final answer
    x = 10,945.35

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Double scale
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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.