Home / 12,985.66-17,929.81-7,956.75

Finding the Fourth Proportional to 12,985.66, 17,929.81 and 7,956.75

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Solution

The fourth proportional to 12,985.66, 17,929.81 and 7,956.75 is: 10,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.66 : 17,929.81 = 7,956.75 : x
  2. Step 2: Convert to fraction form
    12,985.66/17,929.81 = 7,956.75/x
  3. Step 3: Cross multiply
    12,985.66x = 17,929.81 × 7,956.75
  4. Step 4: Simplify right side
    12,985.66x = 142,662,995.83
  5. Step 5: Solve for x
    x = 142,662,995.83/12,985.66
  6. Step 6: Final answer
    x = 10,986.20

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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.