Home / 12,979.53-17,911.74-7,011.20

Finding the Fourth Proportional to 12,979.53, 17,911.74 and 7,011.20

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Solution

The fourth proportional to 12,979.53, 17,911.74 and 7,011.20 is: 9,675.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.53 : 17,911.74 = 7,011.20 : x
  2. Step 2: Convert to fraction form
    12,979.53/17,911.74 = 7,011.20/x
  3. Step 3: Cross multiply
    12,979.53x = 17,911.74 × 7,011.20
  4. Step 4: Simplify right side
    12,979.53x = 125,582,688.78
  5. Step 5: Solve for x
    x = 125,582,688.78/12,979.53
  6. Step 6: Final answer
    x = 9,675.44

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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.