Home / 12,989.66-17,921.48-7,948.62

Finding the Fourth Proportional to 12,989.66, 17,921.48 and 7,948.62

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Solution

The fourth proportional to 12,989.66, 17,921.48 and 7,948.62 is: 10,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.66 : 17,921.48 = 7,948.62 : x
  2. Step 2: Convert to fraction form
    12,989.66/17,921.48 = 7,948.62/x
  3. Step 3: Cross multiply
    12,989.66x = 17,921.48 × 7,948.62
  4. Step 4: Simplify right side
    12,989.66x = 142,450,994.61
  5. Step 5: Solve for x
    x = 142,450,994.61/12,989.66
  6. Step 6: Final answer
    x = 10,966.50

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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.