Home / 13,753.18-18,979.07-7,784.90

Finding the Fourth Proportional to 13,753.18, 18,979.07 and 7,784.90

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Solution

The fourth proportional to 13,753.18, 18,979.07 and 7,784.90 is: 10,742.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.18 : 18,979.07 = 7,784.90 : x
  2. Step 2: Convert to fraction form
    13,753.18/18,979.07 = 7,784.90/x
  3. Step 3: Cross multiply
    13,753.18x = 18,979.07 × 7,784.90
  4. Step 4: Simplify right side
    13,753.18x = 147,750,162.04
  5. Step 5: Solve for x
    x = 147,750,162.04/13,753.18
  6. Step 6: Final answer
    x = 10,742.98

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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.