Home / 13,979.90-20,942.30-7,389.74

Finding the Fourth Proportional to 13,979.90, 20,942.30 and 7,389.74

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Solution

The fourth proportional to 13,979.90, 20,942.30 and 7,389.74 is: 11,070.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.90 : 20,942.30 = 7,389.74 : x
  2. Step 2: Convert to fraction form
    13,979.90/20,942.30 = 7,389.74/x
  3. Step 3: Cross multiply
    13,979.90x = 20,942.30 × 7,389.74
  4. Step 4: Simplify right side
    13,979.90x = 154,758,152.00
  5. Step 5: Solve for x
    x = 154,758,152.00/13,979.90
  6. Step 6: Final answer
    x = 11,070.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.